Re: HD TV
On my Comcast display, when you bring up a low-def channel (down in the usual channel range) and there's an HD version available, a big yellow button shows up for a minute on the bottom of the screen that says "Watch In HD." Quickly hit that with your cursor/select thing, and it flips you to the HD version of that channel, which on my cable setup is always a 700 channel number. 800 numbers are pay movie HD.