User-supplied data

Following a reference trail in preparation for writing my assignment I came across an article by Michael Koenig - Linking library users: A culture change in librarianship. It is about user-supplied data. He believes that encouraging users to add information to the catalogue about titles they have read will cut down on information overload. The reasoning is that the more information people have about a resource the easier it is to tell if the resource will meet their needs. It seems to me that there are a couple of problems with this. Firstly, the added information could just add to the overload and secondly, will patrons add comments and, if so, will they be useful or just along the lines of "I loved this book"?
After reading this article I remembered a recent thread on NZ-Libs about a patron wanting more information on titles, similar to that on Amazon, and that one NZ library has recently linked their catalogue with LibraryThing. I fished out the reference and had a look at Nelson's catalogue. It's great, I love it and I think many people would find it useful. Using LibraryThing means there isn't a lag while you are waiting for patrons to add information and it draws on a much larger population than just a single library's membership. I wonder if there are any plans to add this to our new catalogue? My only minor quibble is that I think the location information should come before the tags and "similar books" so people can more easily ignore this information if they want to.