LibraryThing Takes a Page From

The do-it-yourself cataloging website LibraryThing allows users to tag their books, much like Flickr and As of yesterday, tag information is displayed similar to tags, with a list of users of the tag and the books that have been tagged, as well as related tags. Eventually, LibraryThing will also include Library of Congress Subject Headings, but for now users are making due with their own folksonomy.