This comment on Tim Blair's site pretty much sums it up:

Look, Howard Dean's head is shaped like a thumb. Or, a big-toe.

I simply can't hear the voice of someone whose head is shaped like a digit, or a pied.

His head isn't a real man's head, it's a cartoonist's head. Maybe that's what makes him so mad .......... his head looks like a toe.

Hat tip to Jeff Jarvis.