[farray]

I once tried ChanL but it was buggy, and concurrency bugs are the worst to debug.

lparallel on the other hand was solid to me, though I didn't like its API and had to (trivially) build my own message-passing abstractions on top of it.

[fiddlerwoaroof]

I've been a bit interested in this, basically an attempt to bring some of the nice things of the Erlang/OTP platform to CL:

http://mr.gy/blog/erlangen-intro.html