I'd keep the intro and and exit segments. They're like the covers on a book. Sure, -WE- all know who you are and what you're about, but you have to produce each piece such that someone who's never seen or heard of you before will "get it".
Actually, the only thing that annoys me is the music under the exit segment, and I don't know why. I just don't like it, and that's certainly nothing more than my opinion.