I remember being impressed with Biden when there were still about ten or so candidates in the race for the Democratic nomination (Dodd, Kucinich, etc.)  I watched the debate and thought Biden was the best.  (I also liked Edwards and Obama, in that order.)  I think that Obama will do a great job as president if elected, but I can’t deny that, experience-wise, I would feel a lot more comfortable if he were the VP candidate and Biden were the presidential candidate.