Awesome idea:
The company [Google], joined by other heavyweights like Microsoft and Dell, has long been lobbying for the Federal Communications Commission to free up unused broadcast TV channels known as "white spaces" for unlicensed use by personal devices. That portion of the TV band is highly prized because it can propagate long distances and through obstacles.
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Google outlines proposal for 'Wi-Fi on steroids' | Tech news blog - CNET News.com