One of the many creative minds over at XDA Developers may has come up with a way to turn your HTC HD2 into a metal detector. XDA member 6Fg8 has created an application, Metal Detector, that works under the premises that the built in compass on the HD2 relies on the earth's magnetic field to calculate the deviation from magnetic north. If you put a piece of metal near the compass, it deviates from the natural deviation.

There are still a few bugs to work out in the application but for the most part, it performs as advertised. Yet somehow I don't see scanning the beach with an HD2 looking for buried treasure.  However, if that screw you dropped blends in too well with the carpet, this application might be of some use. [via]