I think this topic was raised before, and I recall Ian saying users can go to #cdr on EFnet (that's IRC, for those who don't know). A web-based chat system wouldn't be bad, but I'm partial to IRC. It's |<r/|) 31337!
I can't even get into EFnet now because of my dumb firwall on my router. I've tried setting it where EFnet and MiRC are supposed to be let in through the firewall. I doubt very many people here (CDRLabs) even bother to use IRC that much anyways.
I think an actual java chat room or something like that would be best.