ChatRoulette is a neat idea, but I can't imagine even the creators could have imagined what it has become. You can't go more than three rotations without getting some random dude's junk flashing back at your face.
But it's interactions like this that make it all worth while. Realm Pictures created a radical FPS game that interacts with other ChatRoulette Users to fight zombies and get out alive. It's really flippin' cool.