I dunno... I get this sinking feeling that Biden is going to call Palin "missy" or "dear", and then say something of equal stupidity to "FDR went on TV during the great depression."
All Palin has to do is get one "you're a sexist douchebag" zinger off, and then go into a defensive crouch, and she'll come out looking like the winner.
It's a battle of lowered expectations, essentially. The one who makes the fewest gaffes wins.