Loopt, which was founded by a Stanford University computer science major, is currently available on Boost Mobile and Sprint Nextel. Brian Knapp, the firm's vice president, said the application provides a novel answer to two popular questions: (1) "Where are you?" (2) "What are you doing?" The product, as described in its tagline, wants to be "your social compass."

Rachelle Chong, a former FCC commissioner who is now on the California Public Utilities Commission is part of the Loopt community. Chong, a self-described technology junkie, seemed intrigued by the tracking tool. Knapp, who is also the firm's chief privacy officer, prefers to call the offering "location sharing."

I’m a Sprint customer and Knapp sent me an invitation to try out the service as well. I'm not sure yet whether I'll opt-in. My location patterns would look something like this: "Office -> Capitol Hill -> Office -> Capitol Hill -> Office -> Capitol Hill -> Office." Not very interesting.

I would love to get members of Congress in on the game. That would be a lot easier than stalking them in hallways and in between hearings.