Yep. My Gateway Solo 9300 offers RCA Video in and out, and also an optical SP/DIF port. Works well for DVD playback either on it's 15 inch viewable LCD or via VGA or TV out.
But by what I understand, newer 9300's are missing these features.
<< why whould u wanna watch DVDs on a laptop? so u can look at the screen with a magnifying glass? >>
No, since I don't place my laptop across the room to watch. It is so nice to be able to watch movies on a train ride, or to get confortable in bed and watch a movie without having to have DVD playback in your room. And considering my laptop has a 15 inch screen, I'd hardly say thats small when it sits a few feet away from your eyes.