Now that most of us have a pocket computer in our hands, known otherwise as an iPhone or iPod touch, what are some cool things that you can do with an iPhone? I found a few . Diagnose your car I already do this one with a kit from Kiwi, and it works great. Remote Control I do not do this, but I thought it was cool, it must be annoying to plug in the device everytime I want to control something, so it seems a little counter-intuitive. Unlock and start your car and disarm the alarm, I am thinking about getting this installed in my car, but I really don't need it. Does anyone know of other cool and weird things exist for it, like that heartbeat monitor that was shown during the iOS 3 intro?