Is anyone else on Identi.ca? It’s an open source, decentralized Twitter-like microblogging project, and it is pretty awesome. Among other things, you can post to it using a Jabber account such as Gtalk or LJ Talk, and it can send you your friends’ updates over Jabber as well. (I understand this functionality has been broken/disabled on Twitter for a while.) Anyone can install their own version of the software driving it, called Laconica, and friend people on other Laconica services (such as Identi.ca itself).
Hope to see you all there!