In my environment this command from the first example in the README fails:

zerorpc --client --connect tcp://*:1234 strftime %Y/%m/%d

It works fine if the "*" is replaced with "localhost".

Environment:
Mac OS X 10.6.8
Python 2.7.3 (MacPorts)
zerorpc 0.3.0
pyzmq_static 2.2

Traceback:

connecting to "tcp://*:1234"
Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/zerorpc", line 274, in
exit(main())
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/zerorpc", line 265, in main
return run_client(args)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/zerorpc", line 207, in run_client
setup_links(args, client)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/zerorpc", line 94, in setup_links
socket.connect(endpoint)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/zerorpc/socket.py", line 40, in connect
return self._events.connect(endpoint, resolve)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/zerorpc/events.py", line 212, in connect
r.append(self.socket.connect(endpoint))
File "socket.pyx", line 475, in zmq.core.socket.Socket.connect (zmq/core/socket.c:4508)
zmq.core.error.ZMQError: Invalid argument