Like most things that are working well online - you can always find more than one version of it - social networking - take your pick - there are so many out there. Well, we are now using LibraryThing to share our catalog with you all but naturally there are other similar tools out there. I have always liked the idea of having a way to keep track of everything I've read. For people like my own mother who doesn't remember she has read something until she's halfway through it for a second time, it is pretty useful and timesaving. I was invited to join Shelfari which another personal library tool where you can list what books you've read, have but haven't yet read, and a wish list. It links to Amazon.com so you can double check titles and write a commentary on each. It's not as big as LibraryThing but it's prettier and I a little more user-friendly. You can discuss, find like-souls and maybe figure out what to read next.