Yay MIT:)

http://www.cnn.com/2009/TECH/12/05/darpa.balloon.challenge/index.html

http://networkchallenge.darpa.mil/

"The challenge is to be the first to submit the locations of ten moored, 8 foot, red weather balloons located at ten fixed locations in the continental United States. Balloons will be in readily accessible locations and visible from nearby roadways ( Read more... )

http://www.darpa.mil/grandchallenge/docs/urb_challenge_announce.pdfRead more... )