meh.
I'm hard to offend, possibly because I've heard it all before. I suppose that's why, even as a Christian, I was not offended by this movie. I appreciate GOOD satire. Unfortunately, I didn't find this very original. I've heard the ideas before, I've seen it represented in similar ways before. The animation wasn't too great, sound was a bit off, and I just generally couldn't find it funny.
I'm not offended, merely irritated. When a piece of art (painting, comic, flash, whatever) comes across with no stated purpose other than to offend a group of people, it really irritates me...probably because of the hypocritical nature of political correctness...
However, if you're the kind of person who enjoys anything that makes fun of Christianity, Christians, Christ, Mel Gibson, or the movie The Passion of the Christ...well, you might get a kick out of it.