iPhone survival
Since the iPhone 3GS already comes with a built in compass, it should also come with a few other features that would make it a great tool in case you were out in some kind of survivability situation. The iPhone 3gs cases currently out on the market can do a lot of things such as helping you to find the nearest points of interest whether they be gas stations or grocery stores. But if someone is stranded out in the wild, it may be useful to know how to start a fire or what kinds of plants are edible. This would help the nature freaks alot!
