This link does a pretty good job of eviscerating Dean for his appearance on Meet the Press last Sunday.
Having watched the interview, I think that it can be added that Howard Dean uses volume and rate of speed to overcome shortcomings in facts, logic and consistency.
Why the Democrats are using him, leads me to believe that the Democratic Party is lost, and looking to find a base, rather than trying to attract the middle.
A good friend Democrat once explained to me that the Democrats were the centrists, that the vast majority of Americans were right wing, and the Republicans were the Radical Right. Perhaps this is their problem. They don't know who they are, or who anyone esle is either.