The "FCC is currently researching and deploying Rural Broadband Experiments to learn more about White Space in rural areas around the country. The program started at the end of January and the locations will be decided soon." [source]
White Space experiments in the US are centered around schools and libraries as the hub of the community. Only six US cities are giving white spaces a try so far - Wilmington, NC; Pascagoula, MS; Cal.net in El Dorado County, CA; and even Kansas City, KS, home of the Google FiberHood. West Virginia University uses White Spaces to provide Internet on the rapid transportation system.
Interesting note: Delta County in Colorado did a Kickstarter campaign to finish off building their network of Carlson and Meraki gear.
Elizabeth Bowles of Aristotle.Net (and former WISPA President) rallied in DC recently to get the FCC to share that white spaces spectrum with WISPs.
"The FCC is poised to open more of the 5 GHz band for unlicensed Wi-Fi use, though the exact rules for doing so are not yet finalized. The FCC, in announcing its tentative agenda for its March 31 meeting, said it will consider a First Report and Order that would revise rules to make 100 MHz of the 5 GHz UNII-1 band unlicensed spectrum "more useful for consumers and businesses, and reduce the potential for harmful interference to certain incumbent operations." At issue is the 5150-5250 MHz portion of the Unlicensed National Information Infrastructure (UNII) band, whose unlicensed use is currently restricted to lower wattage and indoor operations." FierceWireless