Supernatural Buffy Reunion

Yes, Buffy alums James Marsters and Charisma Carpenter will be playing an unhappily married couple of the fifth episode of Supernatural's seventh season, titled "Shut Up, Dr. Phil." It's not exactly earth-shattering news, but it's one of those fun nerd nods Supernatural seems to like to slip in where it can. And I'm always kind of pleased to see Carpenter getting work. What do you think the odds are of her hitting on San and/or Dean? One in 1.0025?