HDTV101, I have no doubt they'll (wireless providers) demand more spectrum in the future. The problem I have is that they're already sitting on plenty of unused spectrum. One could say they've been hoarding it.
Tux: Existing stations on 51, as Hugh mentioned in his post, won't be affected.
DMX 68' tower, HyGain HAM 5 rotator, Antennas Direct 91-XG & C5, Channel Master 7777 preamp, Siemens surge protection