"And contrary to another posting, you don't need a special antenna for local stations -- Dish network converts them into a satellite signal and they're downloaded just like the other hundreds of channels. "
Converts HD signals into a sat signal and downloads them? What are you talking about? The HD locals are transmitted from the local stations transmitter, not a satellite. And if you get the HD eqpt package from either Direct or Dish, while they give you the necessary equipment, the locals have to be received via a seperate antenna, not the sat dish.