Someone did an application to detect metal using the Android G1.
Is this because the G1 is more smartypanties than other
smartphones? Is it magic perhaps? No, it's a clever use of the
built-in compass.  As you know, a compass detects the magnetic
field of the Earth. And when they get close to an iron core,
they get happy, which is what happens to the G1.  As you can see
in the video, this won't serve you to detect treasures in the
beach. It can serve, however, as a handheld metal detector like
those they use in airports. You know. Those that allow you to
pass your hands all over someone's body to see if they are
hiding metal somewhere?  It's Friday. You probably are going out
tonight. Think, people. THINK. [HDblog via Android Guys via
CrunchGear]