He is excellent, but I think it's the same story as Rice. I doubt he has the skills to hold such a high office.
I would like to see Keyes come back (remember Republican primary 4 years back? I thought he was great, although everyone assumed he wasn't really a serious canidate).
As for Hillary, I don't think the Dems will tap her out. Yes, she's an ambitious b!#@h, but if there's one thing Dems should learn from this election, it's that your traditional anti-war loud-mouth liberal wackos don't appeal to the American public at all.
As for Rudy, I'm predicting that his kind of platform is where Dems will be 8-12 years from now. If the Republicans hold fast and attempt to garner fiscal libertarians like myself over the next 4 years... I think one of the reasons Bush has been so successful is that he's been pretty liberal, for a Republican (fiscally, of course).