I noticed that one blogger named Ken Blackwell as their fantasy 2008 candidate. I would have, too, if he had not promised to serve out his term. I think that was a bad move on his part, because he could easily get the nod for VP (at least), but nonetheless that promise kept me from naming him.
I think with his temperament he would do best in a 2012 election challenging the Democratic incumbent. Not that I'm conceding 2008 yet!