To be completely honest, I do not read recreationally. A tool such as LibraryThing would not be of benefit to me. This looks like it would be very useful to someone who does read or who is looking for new books. It has the capability of cataloguing your favorite books and writing your own reviews on them. You can also search the reviews of other books read by other people on LibraryThing. I was surprised by the amount of books that LibraryThing has reviews on as well as recommended books for different types of readers. LibraryThing is not my forte and do not find myself using this site much for recreational use.
My LibraryThing link http://www.librarything.com/widget.php?shareID=w9f42f782bdc3e3e5600aa8e243d01047&sharefrom=kristinnwood