Apple's own Find My iPhone service is great for finding your misplaced device, but it usually isn't much of a help when someone steals your brand spanking new iPhone to make a quick buck by reselling it.
Looking to contain an explosion of smartphone-related theft, major United States carriers have joined forces on an interesting nationwide initiative. They teamed up with the Federal Communications Commission (FCC) to create a joint database that would keep track of stolen handsets and those reported as lost.
This should drastically reduce resale value of stolen devices as those would be denied voice and data services...