What's Nobody's Business is Everybodys -- Lady Liberty ( a must read )-- March 20, 2006
Ed: Good summary; lots of good internal links

[ Verichip] "Great idea, right? But there are more problems. As of the end of last year, only 68 hospitals could read such chips. The chances of your chip being read at the closest hospital to you when you need one isn't high. But now you've got a potentially hackable, clonable, reprogrammable chip embedded in you that, whether your local hospital can read it or not, most certainly can be read by the right kind of electronics.

Of course, you're probably not all that concerned that a medical reference number be read by unauthorized personnel. After all, what are they going to do with it? Medical records are private, aren't they? Well, that depends on your definition of privacy."
http://www.enterstageright.com/archive/articles/0306/0306business.htm

More info at www.cybertime.net/~ajgood/chipindex.html