I'm planning on seeing it too (this week, assuming Spider-Man 2 is sold out) - with recomendations from Martin Sheen, Leo, and Esther - who could resist?
The only problem I have with Moore's work is pretty much what CC said; he only presents a one-sided truth. With enough footage, you could make a nice little movie completely slamming anyone.
The best thing about Farenheit 9/11 is that it's making people talk about something important. Rather than talk of things that don't matter - television, celebrities, ect. - people are talking about our government.
Anyway, I really like Moore's "semi-documentaries". Roger & Me was awesome, methinks. Also, Bowling For Columbine is only $8.00 this week at Circuit City. I picked up my copy.