Did a search on this story and didn't find it anywhere on the forums. It appears that certain cell services are capable of tracking you location through you cell phone. This story talks about where it is currently implemented.

http://www.cnn.com/2002/WORLD/asiapc...int/index.html

Personally I find this very scary although I think one part of this story shows just how honestly deceptive businessmen can be, I had to smile when I read about bars called "The Office" so men did not have to lie to their bosses and wives when they said they were still at the Office

While this is not implemented here, that I know of, the statistic that productivity increased significantly is the best indicator that it soon may be. Micromanagers will love this technology, their workers will not. Making it possible to leave your cell phone one place while still receiving calls forwarded from it without a trace could be the next multimillion dollar feature to cell to people being traced by this method.