Hillary is not done yet
I've been an Obama supporter since he announced his candidacy, but he better not get too overconfidant. She appears to have picked up steam since she won the Ohio and Texas primaries, and Pennsylvania is looming.
It's quite possible that neither of them will win enough delegates to put them over the top. Here's another thought. What if it comes to a Clinton/Obama ticket for President and Vice-President? Personally, I think they'd blow away McCain/ whoever.