Here in metro Atlanta, Comcast's channel lineup was supposed to have a clue, but it veered off course. This market was comprised of smaller companies which came together as MediaOne, then acquired by AT&T Broadband prior to the Comcast acquisition. As my installer from last year told me, "to get the the HD channel equivalent of an SD, go to the 800's and the numbers should correspond (ABC SD is channel 3, HD 803). However, there are a few that don't match up". Then the HD premiums appear in the 700's, but as they removed several of the Cinemax/Showtime channels, the replacement channels appeared in the 700's with no match to their SD equivalent. It made no sense. They do have an option when watching an SD channel to "view in HD". Press that, and it automatically takes you to that channel. One of the things that would drive me nuts was my wife would scroll through the guide to an SD channel. I would say, let me help you, press the info button and switch to HD. I have seen Comcast in other markets that do have all of their HD channels in the 1000's. UVerse here in metro Atlanta follows the example of having all of the HD channels in the 1000's as well. The DirecTV model is great as it eliminates the guesswork where as to try to find an HD channel.