This is something that has yet to come in the world of web services: "Send me an e-mail notification when movie X is scheduled on any of the following cable channels."

I know I miss a lot of neat things on AMC, because TV Guide doesn't index them with the "movie" channels. And there are things on Bravo that I've been waiting for forever and nearly missed were it not for a friend's warning (the Olivier Beggar's Opera; that strange flashback-laden 1970 David Copperfield...).