I saw Up in the Air this past Wednesday, and it was pretty good. I missed the first nine minutes because I got mixed up on the showing time, and the bus was late, but I don't think I missed very much. It started off slow, as straight comedy, but picked up the pace and the depth as it progressed. By the end, it's an above average social commentary on the need to connect with people. It didn't feel like a Best Picture to me, though, probably because the film is rather light with some heavier, darker moments at the climax and conclusion. The film features very good acting and writing, but only occasionally shows dynamic cinematography. So, I'd recommend renting it, but you don't absolutely need to see it in the theater.