So, if McCain doesn't show up to the debate tonight, they've come up with a backup plan
Basically, Obama would get to answer questions, both from the moderator AND from the audience (unscripted) by himself for the duration. McCain hasn't commented yet, but he said earlier that he will only attend if Congress passes the bailout this morning. I'll wager that the democrats will now have a vested interest in keeping this from happening at least until it's too late for McCain to fly out to Mississippi.
Obama's already surging in the polls. Frankly, I hope McCain doesn't make it: this could be a major turning point in the election.