iPhone Proximity Sensor

Question

Can the iPhone SDK take advantage of the iPhone\'s proximity sensors? If so, why hasn\'t anyone taken advantage of them? I could picture a few decent uses.

For examp

Answer 1

To turn the screen off it's conceivable that more than one sensors is used to figure out if the screen should be turned off or not. The IR proximity sensor described by Cryptognome in conjunction with the Touch screen sensor described by Peter Wone could work out if the iphone is being held close to your face (or something else with a slight electric charge) or if its just very close to something in-animate.