Microsoft recently applied to the FCC to be an administrator of what next-generation wireless broadband system?

Answer: TV spectrum white spaces. According to technologyreview.com, "The first "white spaces" devices, which thread long-range wireless data signals through gaps in TV spectrum, will start to appear later this year.  Microsoft is bidding to play a central role in how they operate." Click the link above to read more about this new development in wireless data communications.