This could be why the FCC asked for help from the Amateur Radio Community:

http://www.hulu.com/watch/36608/talkshow-with-spike-feresten-cable-psa#s-p1-st-i1

They might need it more if the conversion is delayed:

http://www.hulu.com/watch/54019/talkshow-with-spike-feresten-tv-psa-update#s-p1-st-i1