Twitter (HT: Stowe Boyd) is a relatively recent service that enables you to publish activity information to the web. They recently added Jabber support via a simple bot interface. It'd be cool if they integrated XMPP more deeply through support for, say, the user activity extension sent via personal eventing, but at least their little bot is a start. My Twitter page is here. Unfortunately, it's really just yet another social networking silo -- or, as someone called it at a conference I attended recently, a "cylinder of excellence". :-)