Social Networking for Bookworms
The WSJ has an article about LibraryThing.com, calling it:
Tim Spalding, a computer programmer and bibliophile[…] created a Web site where members can create library-quality catalogs of the books they own and display their collection to fellow online bookshelf browsers[…] He launched LibraryThing.com in August as a way to bring the organizational joys of the librarian to a wider array of book nerds.
Tim Spalding: I love you. I created my account already.