Hillary has more super delegates pledged (which everyone at work constantly tells me, that it means nothing). I know Super Delegates can and will jump ship before the Convention (except Bill of course). This is way more interesting to me then the Superbowl. Plus it didn't cost me 50 bucks in an ill advised half time bet.
Keyes was just an example -- he'd have zero chance of winning or gaining national credibility, but he's the kind of religious conservative who would have no problem justifying a primary challenge. The rumblings are out there.