New RFID tag looks like a pepper speck. I assume you could use it for tracking diamonds or even put it in food or medicine to track what you are consuming. RFID powder reminds me of the “microdot” in spy movies except the microdot only carried information versus RFID powder can broadcast information. Currently RFID powder is a prototype, but could be in use in a couple of years.
Digg.com posts, “0.05mm x 0.05mm RFID chips. The new chips are 64 times smaller than the previous record holder, the 0.4mm x 0.4mm mu-chips, and nine times smaller than Hitachi’s last year prototype, and yet still make room for a 128-bit ROM that can store a unique 38-digit ID number”