Howard Dean has joined Madeleine Kunin (but not Jim Douglas) on the list of former Vermont governors on Twitter with username @GovHowardDean. He started tweeting back in June, but it's only in the last couple of weeks that he's found his stride. At the moment, Dean seems particularly enamored of the retweet button but when the former governor speaks for himself in his tweets, it's as good as you'd expect.
Dean started his Twitter life with a scream joke. So self-aware.