The official LetsRun.com NCAA group is going to be on ESPN. If you already have a bracket there search for group name LetsRun.com or click on this lin:
http://games.espn.go.com/tournament-challenge-bracket/en/group?groupID=86293
If you haven't entered yet or use the same link:
http://games.espn.go.com/tournament-challenge-bracket/en/group?groupID=86293
Since we've done a bad job of promoting this and there have been LetsRun.com groups at various sites to encourage people to participate in this group if we get 500 entrants, little LetsRun.com will give $100 to the group winner.
Good luck.