My co-worker Mike pointed out an article that's got to make some people more than a little nervous. Imagine if an RFID chip could be embedded in a piece of paper, virtually undetectable.

Well, it can. You can imagine the security and privacy concerns (while marveling at the technical advances). From EETimes.com:

*"Hitachi was due to present details of the 0.15-millimeter by 0.15-millimeter, 7.5-micron-thick chip on Sunday (Feb. 5) at the IEEE International Solid-State Circuits Conference (ISSCC) in San Francisco. *

"Paper is typically 80 microns to 100 microns thick, and the chip substrate has been made small and thinned to 7.5 micron to ease application in paper, where it could be used as an intelligent watermark."