As of yesterday, Bovada gives the Creighton Bluejays 25/1 odds to win the NCAA Tournament. Villanova (pre-2 OT thriller) ranks just behind at 28/1. Xavier (200/1) and Georgetown (250/1) are longshots, but still getting some action by those who enjoy this kind of stuff.*
*BECB does not condone betting, yada yada yada.