I picked up a Zenith 520 at CC for $499 and was expecting to pickup NBC/WEEK on 57, but I find nothing there. Is this channel online or not? Also, as I sit here watching WHOI and WMDB digital, They aren't broadcasting HD, even at prime time (Letterman, Nightline). Is this typical? It is a little disappointing. Also, I'm a bit suprised that it is being said that one should be able to pick up Moline or Springfield with a rooftop antenna from Peoria. I have a rooftop, and I'm getting neither of them. If its possible to do, what am I missing here?