I stumbled upon this fine list while reading the Wikipedia article on "Horror Film". Ive yet to check out the rest of the site, but this extensive list makes for a very interesting read. I agree with many of his choices, though there are some I would either omit or rank higher. It's insanely long, and takes forever to read, but I recomend doing what I did: bookmarking it and reading half a page or so whenever your're on. He screws up some info near the end [It's only a movie...], but other than that he seems very knowedgeable and has put toghether a very cool list.
7th Level's Top 100
BTW- Before anyone accuses me of spamming, I say this: I wish! There is no chance I could make such a detailed, expansive, interesting and largely accurate list.