I've set up an IRC channel on irc.freenode.net. It's called #yt, and I'm going to start sitting in it.
You can join using Adium (on OSX) or irssi or something on Linux. I've also put up an IRC webchat frontend here:
The Enzo workshop this week is using IRC and have found it (so far) to be pretty productive. I think we could give this a shot and see if it's worthwhile. If not, we can just let it be self-regulating. :)