Link 1: Gnooks - Welcome to the World of Literature

Gnooks is a self-adapting community system based on the gnod engine. Discover new writers you will like, travel the map. of literature and discuss your favorite books and authors.
Link 2: Gnoosic - Discover new Music

Gnod is a self-adapting system that learns about the outer world by asking its visitors what they like and what they don't like. In this instance of gnod all is about music. Gnod is kind of a search engine for music you don't know about. It will ask you what music you like and then think about what you might like too. When I set gnod online its database was completely empty. Now it contains thousands of bands and quite some knowledge about who likes what. And gnod learns more every day...
Link 3: Gnovies - Discover new Movies

Gnovies is a self-adapting community system based on the gnod engine. Discover new movies you will like, travel the map of movies and join the discussion.
Searching for Doctor Who yields these suggestions: