Our mailing list is probably the most responsive one around. Nevertheless, we thought having an IRC channel could come in handy, so the community would have a place to hang around in, and perhaps also get questions answered quicker once the channel gets big enough.

Come visit us at #RavenDB on Freenode!

BTW - There are quite a few free web UIs available if you don't want to install any software, see http://webchat.freenode.net/ for example