Librarian X With great power comes great bibliography.

Twitter/Friendfeed article

If you're having trouble figuring out the point of this whole Twitter and Friendfeed thing (or if you've never heard of Friendfeed since it hasn't had a media blitz yet), check out this article on Library Journal by my friends Laura Carscaddon and Colleen Harris: "Working the Social: Twitter and FriendFeed."

They do a great job of condensing and explaining the point of both services, and how and why you might want to use them.