Yesterday Disney Interactive Studios revealed that their upcoming movie-game G-Force would have a 3D option for the 360 and PS3 version of the game.
You can turn the mode on and off on the fly. I'm told that if you happen to have a pair of red and blue 3D glasses lying around the house and you put them on to watch this video it will look 3Dish. Of course I recorded this with a little handheld camera, so it doesn't really do the effect justice. But maybe you can get a taste of 3D guinea pig.