perhaps you'd prefer not to have GPS in your phone, but my kids and i like to Geocache so we're out walking around with the gps in hand. i'd rather just have my iPhone than the iPhone and the portable GPS. <br><br>also getting a second GPS for our second car is going to cost a pretty penny. in a pinch, i'd love to have the iPhone work as as a GPS just in case i ended up without our main GPS unit. there's a reason a lot of people want it and it isn't trivial. <br><br>