On another user group that I participate we have an IRC chat room. In some cases it is very useful.
Anyone like the idea? There are web versions of IRC (Internet Relay Chat) like:
http://webchat.freenode.net/ We can create our own chat room.
The problem with "chat rooms" is that the conversations will not be recorded and can not be reference in the future.
But as I said, sometime is better to have a live conversation.
Kelloggs