DIY cell phone tracking

Our pals at Popular Science have a write up of a low cost way to do your own cell phone tracking - '...Jen, is tracking me. Using a $100 kit from Mologogo (with a $6-a-month data plan), I've turned a prepaid cellphone into a GPS tracking device. Every few minutes, the phone transmits my location within 100 meters to mologogo.com, which posts it to a Google map that Jen can access from any computer. She can view my most recent spot or my past 100 recorded locations as little pushpins stamped with date and time.'