Yeah, Kung-Foot is pretty cool. It's such a simple concept, but it works really well. I haven't managed to get 4 people around to play it, but a 2 player game can be a lot of fun too.
I haven't really played many stealth games before, would Styx be a good game for beginners? I got Mark of the Ninja recently, which is supposed to be a pretty accessible stealth game, just wondering if Styx is only for hardcore stealth enthusiasts (that sounded better in my head).