Really? Cruise had the most exciting part, and I can't think of too many people who have the looks/star quality/charisma/smugness to pull off one of those seminars as well as he does. He's wonderfully loathsome, and his deconstruction with the female interviewer is done perfectly in my opinion. The only scene of his I wasn't totally convinced by, was the deathbed scene, but I went with it.
Jason RobarRAB, Melora Walters and Philip Baker Hall are all excellent as well. The only real non starter for me was the quiz kid segments.
Above all that though, I think films like Magnolia and Being John Malkovich are great examples of the endless possibilities you have with the movies.