Just saw the movie - it was pretty good, but the book was better.
Interesting casting - aside from Michael Cera, Brandon Routh and Jason Schwartzman make appearances. Also funny is that Mae Whitman has a prominent role and she was Michael Cera's girlfriend on Arrested Development.
Kieran Culkin was also in the film - I didn't know he was still acting.
I lose some credibility here... I didn't realize that Jason Schwartzman was Rushmore until about 5 minutes ago.