Librarians from the AIDS Library in Philadelphia maintain the page, tagging resources and then assigning them to Dewey call number ranges. I just think that's one of the most bibliogeekarific I've ever seen. What's weird, though, is I don't see a link to it on their site. Am I missing it? Is it more for internal/librarian than external/patron use?
Because the resources are all assigned to one or more Dewey ranges, you can see at a glance in which areas they (or the internet in general?) are strong, and which need more attention. I'll personally be on the lookout for fiction pages/sites to tag for:aidslibrarian.
They also have a Flickr account, offer downloadable fact sheets, provide pathfinders for online publications, Philadelphia area services and living with AIDS, and deliver computer/Internet services and tutorials.