RFID UPDATE
This one doesn’t get embedded in your body, but RFID in paper sounds vaguely troubling. It might help stop counterfeiting, but couldn’t it also make a sticky note into an eavesdropping device?
“Research teams at North Dakota State University, Fargo, have developed a method to embed radio frequency identification (RFID) tags in paper, which could help combat document counterfeiting, and have developed antennaless RFID tags for use on metal.” (via NDSU Develops “Smart” Paper and Antennaless RFID Tags)
Barbara K Iverson 