Keith Olbermann, God Of Twitter
Gregg Pollowitz modestly titles his new post the "Funniest Keith Olberman Thing You'll Read Today"--and it's tough to argue with him.
Another post on the Olbermannic-depressive Keith is also humorous, but in a much more sardonic way (and it dovetails remarkably well with the quote from Jonah just below this post): "Howard Dean urges civility towards president … on Olbermann’s show."
(Incidentally, Olbermann claimed--on air!--that "I‘m not on Twitter. I tried to sign up last summer and abandoned the project." Unfortunately, there wasn't a video at the time that simplified the complexities and contradictions of Twitter's postmodern architecture. But now there is!)