My wife and I talked about this and I think this might really be useful in some cases. If I had a mentally handicapped child or maybe a parent with Alzheimer's disease it might be a good idea. Time will tell, lets sit back and watch. <_<
Edit - Found more info on this story and I was shocked to see it's been in use on people for sometime now, just not in the USA! SEE below.
This summer, General Rafael Macedo de la Concha, attorney general of Mexico, announced that he and scores of his subordinates had received implanted chips that controlled access to a secure room and documents considered vital in Mexico's war with drug cartels. The Mexican company Solusat, the sole distributor of VeriChip in that country, has said that about 1,000 Mexicans have the chip implants, which allow a link to a database holding their medical records.
"You can have all the benefits of radio identification," Antonio Aceves, general director of Solusat, said, "but now it is inside your body."
In March, the Baja Beach Club in Barcelona began offering VeriChips to regular patrons who wanted to dispense with traditional identification and credit cards. About 50 "VIPs" have received the chip so far, according to a company spokesman, which allows them to link their identities to a payment system. The program was expanded last week to a club in Rotterdam also owned by Baja, and about 35 people there have already signed up for the implants, the company said.
VeriChip announced last week that it had signed a distribution agreement with the British company Surge IT Solutions, which intends to use the technology to control access to government facilities. And Antonia Giorgio Antonucci, an Italian physician, is leading a study using VeriChip at the National Institute for Infectious Diseases Lazzaro Spallanzani in Rome.
"We want to see if the doctors think the device is practical or not," Antonucci said.
Applied Digital has been free to sell VeriChip in the United States for nonmedical applications, but lack of acceptance of the technology made federal approval for medical uses a high priority.
http://www.forbes.com/technology/feeds/general/2004/10/15/generalbhsuper_2004_10_15_INHT_0000-8758-KEYWORD.Missing.html?partner=yahoo&referrer=