I finally got around to seeing
Waking Life last night. It was quite interesting; it started off as a number of animated people talking about reality, free will, identity and the like, but evolved beyond that, going into lucid dreaming and false awakenings, and even the question of what happens after death. And the visuals were quite effective; the film was animated (apparently drawn over video footage), and the animation varied in styles quite effectively. I'll probably have to see it again (perhaps when it comes out on DVD).