Not sure if this is true , but are they blocking QAM ?
I know they are looking for space to keep up with the HD demand.
They still have plenty of room to work , I don`t know.
Next best thing to try is an outside antenna and see what you can pull in for QAM , or of course get a box.
Comcast has some fair packages for triple play , not that I think it`s worth the price , but you are going to have to pay , one way or another.