Washington - although they're not under the radar, 25:1 (or better) to win the Nat'l Championship? A QB that was once mentioned for a Heisman Trophy, one of the best coaches in the nation, and arguable the best defense.
South Carolina - I said it last year and I'll say it again. They will be able to outscore anyone - if they're back seven on defense come around (they're mostly all new) then they could win ten games. UGA won't cover that huge number in Columbia, either.