Recently, I discovered Hulu.com, as an online place to view my favorite tv shows and movies. You have to go through a fairly elaborate sign-up process and endure some ads, but viewing is completely free. Yesterday, I was able to watch a few episodes of the Dick Van Dyke show and quite a bit of the classic film, Easy Rider. I don't think that I will be giving up my cable subscription anytime soon, but I definitely think sites like these are our future.
Hulu gives the user the opportunity to subscribe to particular channels and RSS feeds of your favorite searches. If you are interested in classic films for instance, you could subscribe to that particular RSS feed and be notified of updates to the Hulu catalog. I would write more, but I have to get back to viewing my favorite shows and movies!