Not trying to do a commercial for DirecTV, but I gotta hand it to them... they always come up with great apps, and they always do it QUICKLY. Not 10 years after the iphone has launched, but right away! Staying current is key!
I had no idea that they had made an ipad app, in addition to their iphone app! It is totally awesome and totally free. Check this out:
It gives you an area to mark your favorite channels, as well as your favorite sports teams so that it can always show you when any of them are playing.