Maine vs. UMass was one of the best college games ever. Didn't get decided until halfway through the third OT, and was as offensive of a 2-1 final as you could imagine. (and by offensive I mean full of offense, not offensive as in distasteful).
Maine taking their regional is the only one that I'm confident in. I could see 3 of the 4 teams in both the Northeast and Midwest regions (sorry, Niagara and Notre Dame) and either Dakota or Denver winning the West.
Frozen 4 > Final 4.
The UND-Minnesota game was outstanding has well. Even made the highlights for SportsCenter.