This site allows for a great deal of social networking. Once you enter a book into your library you are told how many others have copies of that specific book. You can then link to those libraries. You can check out other libraries on the site and submit comments about their libraries. There are forums for people with similar book interests and you can recommend books to others.
I've posted a link to mylibrary on the sidebar of this blog. It randomly pulls up 3 books from my library.You can click on the mylibrary link and view the books in my library. I have about 100 books entered. I was astonished to learn that some libraries on this site have thousands of books!
I was impressed with the many different forums and also with the possibilities to discuss some of my favourite books with people I might otherwise never come into contact with.
Check it out.