diff --git a/src/prc_publish/coop_gevent.py b/src/prc_publish/coop_gevent.py
deleted file mode 100644
index cd13ae6..0000000
--- a/src/prc_publish/coop_gevent.py
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright (c) 2011 Andreas Balogh
-# See LICENSE for details.
-
-""" prc_publish.coop_gevent """
-
-# imports
-
-import logging
-import datetime as dt
-
-# constants
-
-# globals
-
-LOG = logging.getLogger()
-
-# definitions
diff --git a/src/publisher/coop_eventlet.py b/src/publisher/coop_eventlet.py
new file mode 100644
index 0000000..fb8df7d
--- /dev/null
+++ b/src/publisher/coop_eventlet.py
@@ -0,0 +1,133 @@
+# Copyright (c) 2011 Andreas Balogh
+# See LICENSE for details.
+
+""" prc_publish.eventlet
+
+Price Publisher
+"""
+
+# imports
+
+from argparse import ArgumentParser
+import eventlet
+import logging
+import os
+import random
+import sys
+
+LOG = logging.getLogger()
+
+# definitions
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+    LOG.info("starting '%s %s'", os.path.basename(argv[0]), " ".join(argv[1:]))
+    # parse options and arguments
+    parser = ArgumentParser(description="Price Publisher")
+    parser.add_argument("-f", "--file", dest="filename",
+                      help="read configuration from %(dest)s")
+    parser.add_argument("-p", "--port", default=8001, type=int,
+                      help="server port [default: %(default)s")
+    args = parser.parse_args()
+    print args
+    # create product dict
+    prds = { }
+    pubqs = []
+    for n in range(10):
+        key = "AB" + "{:04}".format(n)
+        prds["AB" + key] = Pricer(key)
+    # start one thread for price changes
+    eventlet.spawn(controller, prds, pubqs)
+    address = ('localhost', 8010)
+    eventlet.spawn(listener, address, pubqs)
+    # main thread runs eventlet loop
+    while True:
+        eventlet.sleep(10)
+
+
+def listener(address, pubqs):
+    sock = eventlet.listen(address)
+    while True:
+        LOG.info('waiting for connection on %s', address)
+        cx, remote = sock.accept()
+        LOG.info("accepting connection from %s", remote)
+        inq = eventlet.queue.Queue()
+        pubqs.append(inq)
+        eventlet.spawn(receiver, cx)
+        eventlet.spawn(publisher, pubqs, inq, cx)
+
+
+def publisher(pubqs, inq, cx):
+    LOG.info("Publisher running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            # what happens if client dies during queue wait
+            try:
+                with eventlet.Timeout(1):
+                    item = inq.get()
+                    # TODO: pickle
+                    s = "{0[0]} {0[1]}\n\r".format(item)
+                    cx.send(s)
+            except eventlet.Timeout:
+                # raises IOError if connection lost 
+                LOG.debug(cx.fileno())
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+        pubqs.remove(inq)
+    LOG.info("Publisher terminated")
+
+
+def receiver(cx):
+    LOG.info("Receiver running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            s = cx.recv(4096)
+            if not s:
+                break
+            LOG.info(s)
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+    LOG.info("Receiver terminated")
+
+def controller(prds, pubqs):
+    while True:
+        LOG.info("Price update cycle")
+        Pricer.VOLA = update_vola(Pricer.VOLA)
+        LOG.debug("controller: %i pubqs", len(pubqs))
+        for prd in prds.values():
+            prd.run()
+            for pubq in pubqs:
+                pubq.put((prd.name, prd.prc))
+        eventlet.sleep(5)
+
+def update_vola(old_vola):
+    new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
+    return new_vola
+
+class Pricer(object):
+    VOLA = 0.01
+    def __init__(self, name):
+        self.name = name
+        self.prc = random.random() * 100.0
+        self.daemon = True
+
+    def run(self):
+        self.prc += random.choice((-1, +1)) * self.VOLA
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG,
+                        format='%(asctime)s.%(msecs)03i %(levelname).4s %(funcName)10s: %(message)s',
+                        datefmt='%H:%M:%S')
+    main()
diff --git a/src/publisher/coop_gevent.py b/src/publisher/coop_gevent.py
new file mode 100644
index 0000000..9e7ff81
--- /dev/null
+++ b/src/publisher/coop_gevent.py
@@ -0,0 +1,134 @@
+# Copyright (c) 2011 Andreas Balogh
+# See LICENSE for details.
+
+""" prc_publish.multi_thread
+
+Price Publisher
+"""
+
+# imports
+
+from argparse import ArgumentParser
+import gevent.socket
+import gevent.queue
+import gevent
+import logging
+import os
+import random
+import socket
+import sys
+
+LOG = logging.getLogger()
+
+# definitions
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+    LOG.info("starting '%s %s'", os.path.basename(argv[0]), " ".join(argv[1:]))
+    # parse options and arguments
+    parser = ArgumentParser(description="Price Publisher")
+    parser.add_argument("-f", "--file", dest="filename",
+                      help="read configuration from %(dest)s")
+    parser.add_argument("-p", "--port", default=8001, type=int,
+                      help="server port [default: %(default)s")
+    args = parser.parse_args()
+    print args
+    # create product dict
+    threads = []
+    prds = { }
+    pubqs = []
+    for n in range(10):
+        key = "AB" + "{:04}".format(n)
+        prds["AB" + key] = Pricer(key)
+    # start one thread for price changes
+    gevent.spawn(controller, prds, pubqs)
+    address = ('localhost', 8010)
+    gevent.spawn(listener, address, pubqs)
+    # main thread runs gevent loop
+    while True:
+        gevent.sleep(10)
+
+
+def listener(address, pubqs):
+    sock = gevent.socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.bind(address)
+    sock.listen(1)
+    while True:
+        LOG.info('waiting for connection on %s', address)
+        cx, address = sock.accept()
+        LOG.info("accepting connection from %s", address)
+        inq = gevent.queue.Queue()
+        pubqs.append(inq)
+        gevent.spawn(receiver, cx)
+        gevent.spawn(publisher, pubqs, inq, cx)
+
+
+def publisher(pubqs, inq, cx):
+    LOG.info("Publisher running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            # what happens if client dies during queue wait
+            item = inq.get()
+            # TODO: pickle
+            s = "{0[0]} {0[1]}\n\r".format(item)
+            cx.send(s)
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+        pubqs.remove(inq)
+    LOG.info("Publisher terminated")
+
+
+def receiver(cx):
+    LOG.info("Receiver running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            s = cx.recv(4096)
+            if not s:
+                break
+            LOG.info(s)
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+    LOG.info("Receiver terminated")
+
+def controller(prds, pubqs):
+    while True:
+        LOG.info("Price update cycle")
+        Pricer.VOLA = update_vola(Pricer.VOLA)
+        LOG.debug("controller: %i pubqs", len(pubqs))
+        for prd in prds.values():
+            prd.run()
+            for pubq in pubqs:
+                pubq.put((prd.name, prd.prc))
+        gevent.sleep(5)
+
+def update_vola(old_vola):
+    new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
+    return new_vola
+
+class Pricer():
+    VOLA = 0.01
+    def __init__(self, name):
+        self.name = name
+        self.prc = random.random() * 100.0
+        self.daemon = True
+
+    def run(self):
+        self.prc += random.choice((-1, +1)) * self.VOLA
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG,
+                        format='%(asctime)s.%(msecs)03i %(levelname).4s %(threadName)10s %(message)s',
+                        datefmt='%H:%M:%S')
+    main()
diff --git a/src/publisher/coop_gevent_monkey.py b/src/publisher/coop_gevent_monkey.py
new file mode 100644
index 0000000..0185d9f
--- /dev/null
+++ b/src/publisher/coop_gevent_monkey.py
@@ -0,0 +1,141 @@
+# Copyright (c) 2011 Andreas Balogh
+# See LICENSE for details.
+
+""" prc_publish.multi_thread
+
+Price Publisher
+"""
+
+# imports
+
+from gevent import monkey
+monkey.patch_all()
+
+from argparse import ArgumentParser
+from gevent.queue import Queue
+import gevent
+import logging
+import os
+import random
+import socket
+import sys
+import threading
+
+LOG = logging.getLogger()
+
+# definitions
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+    LOG.info("starting '%s %s'", os.path.basename(argv[0]), " ".join(argv[1:]))
+    # parse options and arguments
+    parser = ArgumentParser(description="Price Publisher")
+    parser.add_argument("-f", "--file", dest="filename",
+                      help="read configuration from %(dest)s")
+    parser.add_argument("-p", "--port", default=8001, type=int,
+                      help="server port [default: %(default)s")
+    args = parser.parse_args()
+    print args
+    # create product dict
+    threads = []
+    prds = { }
+    pubqs = []
+    for n in range(10):
+        key = "AB" + "{:04}".format(n)
+        prds["AB" + key] = Pricer(key)
+    # start one thread for price changes
+    t1 = threading.Thread(target=controller, args=(prds, pubqs))
+    t1.start()
+    address = ('localhost', 8010)
+    t2 = threading.Thread(target=listener, args=(address, pubqs))
+    t2.start()
+    # main thread runs gevent loop
+    while True:
+        gevent.sleep(10)
+
+
+def listener(address, pubqs):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.bind(address)
+    sock.listen(1)
+    while True:
+        LOG.info('waiting for connection on %s', address)
+        cx, address = sock.accept()
+        LOG.info("accepting connection from %s", address)
+        inq = Queue()
+        pubqs.append(inq)
+        rec = threading.Thread(target=receiver, args=(cx,))
+        pub = threading.Thread(target=publisher, args=(pubqs, inq, cx))
+        rec.start()
+        pub.start()
+
+
+def publisher(pubqs, inq, cx):
+    LOG.info("Publisher running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            # what happens if client dies during queue wait
+            item = inq.get()
+            # TODO: pickle
+            s = "{0[0]} {0[1]}\n\r".format(item)
+            cx.send(s)
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+        pubqs.remove(inq)
+    LOG.info("Publisher terminated")
+
+
+def receiver(cx):
+    LOG.info("Receiver running")
+    try:
+        while True:
+            # what happens if client does not pick up
+            s = cx.recv(4096)
+            if not s:
+                break
+            LOG.info(s)
+    # if connection closes
+    except IOError, e:
+        LOG.info(e)
+    # make sure to close the socket
+    finally:
+        cx.close()
+    LOG.info("Receiver terminated")
+
+def controller(prds, pubqs):
+    while True:
+        LOG.info("Price update cycle")
+        Pricer.VOLA = update_vola(Pricer.VOLA)
+        LOG.debug("controller: %i pubqs", len(pubqs))
+        for prd in prds.values():
+            prd.run()
+            for pubq in pubqs:
+                pubq.put((prd.name, prd.prc))
+        gevent.sleep(5)
+
+def update_vola(old_vola):
+    new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
+    return new_vola
+
+class Pricer():
+    VOLA = 0.01
+    def __init__(self, name):
+        self.name = name
+        self.prc = random.random() * 100.0
+        self.daemon = True
+
+    def run(self):
+        self.prc += random.choice((-1, +1)) * self.VOLA
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG,
+                        format='%(asctime)s.%(msecs)03i %(levelname).4s %(threadName)10s %(message)s',
+                        datefmt='%H:%M:%S')
+    main()
diff --git a/src/prc_publish/coop_multitask.py b/src/publisher/coop_multitask.py
similarity index 73%
rename from src/prc_publish/coop_multitask.py
rename to src/publisher/coop_multitask.py
index 52ffd80..84b4c7e 100644
--- a/src/prc_publish/coop_multitask.py
+++ b/src/publisher/coop_multitask.py
@@ -40,36 +40,46 @@ def main(argv=None):
         prds["AB" + key] = Pricer(key)
     # start one thread for price changes
     multitask.add(controller(prds, pubqs))
-    address = ('localhost', 8010)     # family is deduced to be 'AF_INET'
-    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    sock.bind(address)
-    sock.listen(1)
-    multitask.add(listener(sock, pubqs))
+    address = ('localhost', 8010)
+    multitask.add(listener(address, pubqs))
     multitask.run()
 
-def listener(sock, pubqs):
+
+def listener(address, pubqs):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.bind(address)
+    sock.listen(50)
     while True:
         cx, address = yield multitask.accept(sock)
         LOG.info("accepting connection from %s", address)
         inq = multitask.Queue()
         pubqs.append(inq)
-        multitask.add(publisher(inq, cx))
         multitask.add(receiver(cx))
+        multitask.add(publisher(pubqs, inq, cx))
 
 
-def publisher(inq, cx):
+def publisher(pubqs, inq, cx):
     LOG.info("Publisher running")
     try:
         while True:
             # what happens if client does not pick up
-            item = yield inq.get()
-            yield cx.send(item)
+            # what happens if client dies during queue wait
+            try:
+                item = yield inq.get(timeout=1)
+                # TODO: pickle
+                s = "{0[0]} {0[1]}\n\r".format(item)
+                # LOG.debug(s)
+                yield multitask.send(cx, s)
+            except multitask.Timeout:
+                # raises IOError if connection lost 
+                cx.fileno()
     # if connection closes
     except IOError, e:
         LOG.info(e)
     # make sure to close the socket
     finally:
         cx.close()
+        pubqs.remove(inq)
     LOG.info("Publisher terminated")
 
 
@@ -78,7 +88,7 @@ def receiver(cx):
     try:
         while True:
             # what happens if client does not pick up
-            s = yield cx.recv(4096)
+            s = yield multitask.recv(cx, 4096)
             if not s:
                 break
             LOG.info(s)
@@ -90,22 +100,19 @@ def receiver(cx):
         cx.close()
     LOG.info("Receiver terminated")
 
-
-
-def update_vola(old_vola):
-    new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
-    return new_vola
-
-
 def controller(prds, pubqs):
     while True:
-        LOG.info("Price update cycle")
+        LOG.info("controller: price update cycle, %i pubqs", len(pubqs))
         Pricer.VOLA = update_vola(Pricer.VOLA)
         for prd in prds.values():
             prd.run()
             for pubq in pubqs:
-                yield pubq.put((prd.name, prd.prc), timeout=5)
-        yield multitask.sleep(5)
+                yield pubq.put((prd.name, prd.prc))
+        yield # multitask.sleep(5)
+
+def update_vola(old_vola):
+    new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
+    return new_vola
 
 class Pricer():
     VOLA = 0.01
@@ -120,6 +127,6 @@ class Pricer():
 
 if __name__ == '__main__':
     logging.basicConfig(level=logging.DEBUG,
-                        format='%(asctime)s.%(msecs)03i %(levelname).4s %(process)i %(message)s',
+                        format='%(asctime)s.%(msecs)03i %(levelname).4s %(threadName)10s %(message)s',
                         datefmt='%H:%M:%S')
     main()
diff --git a/src/prc_publish/multi_thread.py b/src/publisher/multi_thread.py
similarity index 94%
rename from src/prc_publish/multi_thread.py
rename to src/publisher/multi_thread.py
index 1b6e423..15381c4 100644
--- a/src/prc_publish/multi_thread.py
+++ b/src/publisher/multi_thread.py
@@ -110,8 +110,9 @@ class Publisher(StoppableThread):
         LOG.info("Publisher running")
         try:
             while not self.stopped():
-                # what happens if client does not pick up
+                # what happens if socket closes during queue wait
                 item = self.inq.get()
+                # what happens if client does not pick up
                 self.cx.send(item)
         # if connection closes
         except IOError, e:
@@ -121,6 +122,7 @@ class Publisher(StoppableThread):
             self.cx.close()
         LOG.info("Publisher terminated")
 
+# no way found to simultaneously receive 
 
 def update_vola(old_vola):
     new_vola = max(old_vola + random.choice((-1, +1)) * 0.01, 0.01)
diff --git a/src/prc_publish/single_thread.py b/src/publisher/single_thread.py
similarity index 100%
rename from src/prc_publish/single_thread.py
rename to src/publisher/single_thread.py