TV Ala Carte.
SyncTV, a soon to be released TV-on-demand service, promises to be just that. You pay for what you want to watch and watch it when you want to. For as little as $2-4 per month, you can subscribe to a channel. The catch? Well it's only available over your computer (TV capability is slated to come later), and well we're not sure what the lineup is going to be.
You can subscribe to single channels, which allows you full access to every episode of every show on that channel. They also claim that all their content will be of DVD quality or better, with some shows in HD and surround sound. Definitely something to keep our eyes on for the future, if you're interested in being a beta tester, they are taking requests here.