I like this idea, and I'd like to get notification when new movies become available if they fit what I like. I'd also like to mark movies I want to see which are not available yet (just came out to theaters), and have the system notify me when those movies arrive.

And finally I'd like to have groups of movies, so that I can have a group of my favorite movies, and a group of my kids' favorite movies, and not have everything mixed as amazon seems to do.