An AP story discusses how the device could be a lot more practical than GPS, which can be bulky and a battery drain. It also typically only receives a signal outdoors.
Tricia Duryee
Full Story: http://blog.seattletimes.nwsource.com/techtracks/archives/2007/12/another_mccaw_funded_company_surfaces.html
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Making GPS more like the movie version
In one high-tech thriller after another, the hero attaches a tiny tracking device on the villain and follows him as blinking dot on a computer screen. In real life, this kind of technology would be great for tracking pets or kids, even packages or luggage — anything that tends to wander. But it doesn't really exist.
By Peter Svensson, Associated Press
Full Story: http://www.usatoday.com/tech/wireless/2007-12-14-gps-tracking_N.htm