Bosses Use GPS for Workers

USAToday reports on some companies using global positioning systems (GPS) to track their employees and monitor their work.(Source)

January 2009 Update: GPS is now popular in general life, so I'm sure it's much more in use by businesses than it was in 2005.

I think many companies had this system in one form or another for years before 2005, but I think it's just so much more advanced now.