GPS has come a long way. Today I was walking in the woods with my iPhone looking for the intersection of three state boundaries on Google maps. When I thought I was close, I looked up and the small concrete marker was within 10 feet of me. Once they are affordable, one great addition to small embedded GPS systems would be a "talk back capability". When you get close to your missing object, if you could remotely trigger a request for it to beep or blink, it would be easy to find. Time for a new protocol?