The FCC has announced (pdf) that they've completed lab testing of unlicensed white space broadband technology, and will soon begin field testing. The technology uses "white space" spectrum -- partially freed by the migration to digital television -- to offer un-served consumers inexpensive (theoretically) Internet access via the airwaves. The majority of this next round of testing will be conducted in the Maryland suburbs, according to the FCC's announcement.

The testing is open to the public and announcements of the specific dates and locations will be updated regularly here. -FCC

Microsoft, Google and Dell have formed the backbone of a six-partner coalition named the Wireless Innovation Alliance, which has been pushing the technology hard, insisting the technology has particular potential in rural markets. Microsoft, Motorola and Philips have all submitted prototype devices to the FCC for testing.

This push hasn't been without (occasionally heavy handed) opposition from groups like the National Association of Broadcasters, which is concerned with both interference and the broadcast competition the technology could pose. Traditional wireless carriers want the spectrum auctioned (a battle they know they'd win).

Initial lab testing ran into problems, with the device submitted by Microsoft unable to detect and avoid nearby wireless transmissions. A subsequent prototype submitted by Philips worked as promised. Google (obviously earger to sell ads via the new devices) recently called the technology's launch "inevitable."