I'm testing out a jabber server on MetaFilter. Use any jabber client (iChat, adium, trillian, gAIM, etc) to connect to metafilter.com. Enter your username as email@example.com and your password is your existing website password here. Once logged in, you can IM other members that are online (my current status: ). Oh, this jabber server supports SSL for encrypted chat by default and also lets you talk to jabber users on other servers, including Google Talk (just add them to your buddy list). If this works out, I'll be experimenting with more features like chatrooms and perhaps allowing chat with Yahoo and MSN users as well. Let me know how it works for you, everyone that is a member here already has a login to the jabber server, automatically.