New York Times
New York Times: High Tech, Under the Skin
A thought-provoking article about microchip implants in humans and why some people have chosen to get them. Click on the link for a related classroom lesson plan where students discuss the implications of this technology.
Other
Z Dnet: Smart Chips Get Under Our Skin
As much as it may sound like something out of science fiction, developers have begun to experiment with "smart chips" skin implants to monitor the human body. This article is dated 2001.