Well I finally dumped TWC for Grande (in Waco). My QAM channels with TWC were cut to just ABC, FOX, and PBS, and switching to Grande today got me back all the channels TWC had dropped on me. So, I'm a happy camper again with all the locals available to me again. HDHomeRun quick scan picked them all up easily, now to just get Windows Media Center working and I'm back in business.
Oh, and the Grande install tech had no clue what QAM channels were, and assured me I would not be getting any channels, just internet. I tried to explain it to him, but to no avail. One day I hope cable companies at least mention something about QAM to their employees, I've yet to find an install, support tech, or salesperson who has any clue what it is.
On a side note, I went with 12meg down, 1meg up internet (only a couple bucks more than Roadrunner's 8meg down, 256 up), and testing it on speedtest.net gave me 20meg down, 1meg up. So I'm a happy Grande customer!!!