They have filed for a bunch of 500Mhz Freqs. All conventional too.
http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applMain.jsp?applID=4421755
http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applMain.jsp?applID=4438480
http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applMain.jsp?applID=4421755
http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applMain.jsp?applID=4438480