There used to be this awesome site called moviecritic.com - you'd rank movies and it would predict what movies you'd like. It would recommend me weird movies like Cold Blooded with Jason Priestly - and it would turn out I actually liked them. Moviecritic shut down. I was sad. I joined Netflix because they had something similar, but it never worked as well for me, and my ratings were corrupted by my wife's ratings.
But now there is http://movielens.org. It's a non-profit, so hopefully it won't get shut down in a couple years. Unfortunately, it doesn't seem to work quite as well as moviecritic yet. Although for the most part its predictions match my opinions, it's still recommending me movies I've already seen and didn't like, and it has yet to realize that I consider Naked Lunch and Videodrome cinematic masterpieces.
I figure the problem is it doesn't have enough data to work with yet. The site is only getting 30 hits an hour or so - apparently not enough people know about it.
This is where you come in. You must go to that site, and rate a ton of movies, and give them better data to work with. Go! The fate of humanity depends on it.