The intersection of physical games and Apple's iOS platform is interesting -- the iPad and the iPhone are very good for abstracted interfaces, just because you're touching them directly rather than using a mouse or a keyboard, so it makes sense that they'd be ideal for interacting in a game-like fashion in real space. And Phrase Game, by Removem's Matt Martel, basically does just that. It's a party game, similar to Taboo or even Pictionary, and you play it like one of those.
You need at least four people (or two teams), and the idea is that you actually pass the iPad around from player to player, each time getting a phrase that everyone else needs to guess