When Apple introduced the iPhone 3GS, they added a new piece of hardware: a magnetometer. That little do-dad can pick up magnetic field lines, and basically act as a virtual compass. While kind of a neat feature, I don’t think it’s very practical. I mean, pretty much every iPhone 3G user I know has the data plan, which basically means they can access Google Maps whenever they want. Yes, you can’t get a real time indication of your direction using Google maps, but if you move around you can obviously watch what happens and see which direction you are facing. But to be honest, it’s pretty ...