A tool for cataloguing your own library and for sharing information with like-minded readers. Why would one need that? The Library Thing may seem pointless to people who don't use the web, but to those who do, it is compelling and subtle -- especially those of us who like to organise stuff. It is still quite young but has grown like topsy and has had a massive response. The Library Thing only encourages its users to organise books, not records or magazines. Scope for development there? How well would it work with eBooks? Rather well, if they worked ....... but that is another story.