Australian government's scientific research body CSIRO, has successfully field-tested a new wireless broadband technology using existing TV antenna infrastructure for rural areas. The "Ngara" system field-test in outback Australia yielded a data-rate of 12 megabits per second (1.5MB/s) at a range up to 8.1km (5 miles) using just one channel of a soon-to-be decommissioned 7MHz analogue TV spectrum with just 3-watt antennas. The benefit of such a system is that it utilizes an ubiquitous infrastructure for TV transmission.
Of course, CSIRO isn't the only ones interested, Microsoft has been doing some research of their own in wireless networking on white-spaces.
Microsoft's project, dubbed "WhiteFi" focuses more on the ability to utilize fragmented white space spectrum across different channels as they vary by location and interference. And, have successfully deployed a white-space wireless network at the Microsoft campus that provides a bridge for WiFi internet access within its shuttle buses.