I've seen several people (Michael Arrington, Jeff Barr's links, Postbubble) talking about Feed Crier, a new service that lets you receive alerts in your IM client for when your favorite RSS feeds (craigslist, news, blogs) are updated. I'm surprised by this, because this is not some new mind blowing technology. But ok. I think this service is fine and dandy. Do I see someone using it to be alerted to Sam Ruby's latest Atom comments? Nope. No offense, Sam - I wouldn't use this to subscribe to alerts...