Netflix’s low budget plan is $8.99 per month. For that you get one movie mailed to you at a time and you can watch content on an unlimited basis on their website (I am watching the BBC’s Robin Hood right now). They have a pretty wide-ranging library of movies and tv shows, a good percentage of which you can watch on the web. First run movies you generally have to request be mailed to you.
I have that plan and I'm watching "Signs" with Mel Gibson right now!
Right now, I’m using my xbox 360 to stream content form Netflix. It’s just great.