While Matt is still working on harnessing the book data that we all have contributed to, and making it available for searches, he's also been rather busy fixing other things, and even adding some nifty little features. Read all about it in this Announcements forum post.
"A book is not only a friend, it makes friends for you. When you have possessed a book with mind and spirit, you are enriched. But when you pass it on you are enriched threefold."