Originally Posted by JWiPhone
Wow! Some exciting times around the corner for all of us potential new iPhone users. The magnetometer looks interesting. I can see it having GPS benefits by improving accuracy, and the iPhone will be aware of its state, such as being tilted and direction it is facing. It would be able to 'sense' these states. I can only imagine the applications developers could use this for.
Much like hiking GPS that can be set to true/magnetic north or heading. Just the simple Google Maps program could rotate with the user looking at the screen, always orienting to direction of travel.
I'd use this for geocaching and hiking, but I actually enjoy turning the phone off for a few days while I am out... maybe if I get lost I'll use it