I'm not crazy about any of the alleged frontrunners. I'd rather see almost anyone one of the others whose names were previously bandied about (Sebellius, Clark, Webb, Richardson, Napolitano, Schweitzer, Bloomberg) than one of those three. Of those three, I guess Bayh would be the best.
"It does me no injury for my neighbour to say there are 20 gods or no god. It neither picks my pocket, nor breaks my leg."
-- Thomas Jefferson