XMPP on the Web: Soashable
Soashable is a web based, Open Source, multi-protocol instant messenger based on XMPP(Jabber) using BOSH (XEP-0124 and 0206); it is similar to Meebo. XMPP is anything from an IM protocol to a poor-man's middleware solution. Subject matter will range from technical details of XMPP and Soashable, to high level discussion of Jabber and standardization, to direction of the Soashable project.
Even if you don't come to my session, be sure to check out MinneBar if you're in the area. Last year it had an awesome turn out (I think I heard it was the biggest BarCamp ever), and the MinneDemos throughout the year have become more and more popular (though sometimes the presentations have reflected that... people market/seek VC rather than sharing interesting ideas). The unconference style gets some great conversation outside of the sessions going; I've never had a problem joining any conversation that's sounded interesting.