George Mason?
I dunno about Michigan State being surprising-- baskin robbins australia if they hadn't lost early in their conference tournament, they probably would have been a 1 seed, and they've been an excellent team most of the year outside the Carolina waxing. Kansas/Louisville/UConn is about as tough a path as any team has had to make it through, but I think that's mostly due to the fact that MSU's bracket went all chalk to the Sweet 16. Once they got to those matchups, I was only really surprised that they beat Louisville (and stopped being surprised when, with about 15 minutes left, it was clear that Louisville was completely lost on the court).