I had a game on my old Palm Treo called Arcade Reality. The device camera was used to find and aim at UFOs in the room with you. I installed a game today Sniper Shot! based on the same concept. Wouldn't it be great if there was an app that used GPS to track other "players/prey" and then point your camera at them for the shot? If we can geocache with these devices and use the camera in a sniper game, why isn't this possible? I think it could be a great game.