What about Road Trip? the fraternity house scenes were one of the funniest in that movie! Little Sister with Alyssa Milano is also a good movie w/ Greek life involved (its real old though).
I can't think of other real good college movies right now..the other ones that come to mind are "chick flick" ones like Loser and Boys and Girls and I don't think you'll like those
I'll go to work today (blockbuster)and I'll keep this thread in mind...I'll go browsing and post again.