Today I played around with the iPod Touch (only WiFi) OnStar app for the 2011 Terrain. I have to say, it's pretty cool. If you have a 2011 and OnStar, give it a try. However, I doubt I would ever use it for anything practical. For me, probably the nicest thing was seeing fuel remaining, oil life, and tire pressure. But it was fun to lock and unlock doors, start/stop the engine, and set off the panic alarm.