It's very intriguing to speculate and daydream around this article about emerging technologies and the implications for our domain.. Consider "motes" for instance - if they can monitor ducks, they can monitor people and lots more, probably limited only by the types of sensors they possess:

http://www.technologyreview.com/read...=infotech&pg=1

(It's easier to read without all the ads etc. if you click on the "Print" version but this page doesn't seem to have its own URL.)

Oh and by the way...any of you techie-geekie-systems types might want to visit Crossbow - a company that has development kits, etc. and a free platform for developing wireless sensor networks: http://www.xbow.com/Home/HomePage.aspx - follow the link on the right to the information on "Moteworks" or check out the development kits, sensor modules, etc. by following the links in the left-hand menu.

Enjoy!