I think this is pretty cool. I could imagine it being even more useful (at least to me) if it were one of those iPhone-esque websites. That way I can lazily grab my phone, tap my bookmark for your site, and then flick through the schedule.

Some development ideas: cookies to remember your zip code (a la goingtorain.com), way to mark or flag certain channels as "favorites" and a corresponding favorites view that shows just those channels, a cool but short name :)