I wonder if you could do one where the bracket gets reset after every weekend, i.e. everyone does entries for the first and second round, and then gets their points. Then, everyone picks a new bracket from the remaining teams, and collects additional points for Sweet 16 and Elite Eight games. Do the same thing for the Final Four. Make the points go up as the new brakcets are reorganized and new picks made and then combine the points.
Probably too tough to do on here, or at least not worth the hassle of everyone carrying over points and then matching that up to a re-pick.
Just an idea, though. That way, if the team you have winning it all loses in Round Two, you aren't out of it from the getgo. And before you kind folks assume that I mean that I will be picking Florida and am going to be p.o.'d when they lose to Princeton, you are mistaken as 1) right now I'm not picking Florida and 2) the same might be said of those who pick UT.