mack knife writes "Applied Digital Solutions, Inc., received a patent for a device which can be implanted under the skin and powered by biomechanical energy. The device, a transceiver, can be tracked through GPS. God help us all. Yahoo story here." Or see the company's page. If your kid gets lost at MouseWorldtm, no need to use the park's PA system and annoy everyone by paging him - just whip out the GPS transceiver and home in on him. Maybe we can start implanting them at birth.