well, as a burnt out Deaniac, DEAN! DEANDEANDEAN!
pros: seems intelligent, popular among liberal Dems, grassroots campaign, fundraising, can't call him a flip-flopper like Kerry
cons: Northeastern liberal, unpopular among Republicans, YEEARGH!!!
Seriously though, I think Richardson will be strong in '08 (popular, Southwestern governor, good chance of winning Hispanic vote in Southwest, Florida). I don't think Edwards will run again, because Cheney tried to make his inexperience an issue, plus he's out of a job now. Hillary will run, but won't win the nomination because she really energizes the Republican base, and will have practically no chance of winning. Wesley Clark might also be a good candidate. But I think McCain would be practically unstoppable anyway if he decides to run (barring 4 (more) years of total incompetence by the Bush administration, or if Iraq goes really bad), so it will all be futile.