I just saw this tonight, and without giving too much away, I wasn't very impressed. I loved the first two, but this one started off well but rushed the ending. My wife kept hiding her eyes. I'm wondering what was in the envelope that Amanda read at the end. If they explained it, it went over my head.
I love how all of that stuff happens in two minutes. I read somewhere that Penn says that the South Park take isn't even one of the five worst ones in the film. Needless to say, I can't wait for this to come out.