  Federal Communications Commission Chairman Julius Genachowski
has warned that the U.S. doesn't have enough airwaves set aside
for wireless broadband service in the future, and the agency is
looking at a variety of ways to remedy that shortage.  "The
record is very clear that we're facing a looming spectrum gap,"
said Blair Levin, a former telecom analyst who is in charge of
crafting the FCC's national broadband plan, which is expected to
lay out a variety of things the U.S. can do to increase
broadband availability and usage. The plan will be released in
February.  It's not clear if the proposal will actually make it
into the FCC's final plan. At this stage, FCC officials are
mostly trying to get input from broadcasters and others. Station
owners are likely to fight the plan, although the FCC is
envisioning paying broadcasters for any airwaves that are taken
away.  The agency is "looking at everything, including
broadcasting" airwaves, Mr. Levin said.  The National
Association of Broadcasters "believes it i