Anyone ever consider that Kerry *wants* PsychoGore out there to make him look reasonable by comparison?
Gore gets to pound Bush to the rabid moron.com crowd, and Kerry gets to sit there and look, well, not psycho.
Their strategy last year was to run a composite candidate (one with military experience, Wes Clark, one to appeal to the Nader voters, Howard Dead, one to appeal to the black community, Al Sharpton, one to appeal to the Clinton southerners, Edwards...).
Al Gore is able to say some things that need to be refuted by the DNC but they will never do it. Also, Bill Clinton has been notable silent (then again he's saving it for his book's promotional tour).