Quite simply it tracks the great Robert Scoble to help answer the fundamental question, Is Scoble In This Room?
All you have to do is fire up your web browser or mobile web browser to determine how close you are to the man himself. The app uses Scoble’s public information (in tweets, I suspect) to help social media folks get close to the real thing!
If you’re at SXSW, give it a shot! 😉