All, Has anyone come across Stackless Python (http://www.stackless.com/) before? I've just seen some links to it, and it looks very CSP-like, witness the channels (http://www.stackless.com/wiki/Channels) and tasklets (http://www.stackless.com/wiki/Tasklets). Pickling (http://www.stackless.com/wiki/Pickling) also seems to bear a relation to mobile processes. Neil.