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.
"In the beginning I was just giving books away. I got a new book, I gave away an old one. I always keep just seven. But then I began to find that others were leaving books where I had left mine and I thought, these are for me. So now I replenish my library
with the random gifts of unknown strangers and I never know what I will read next."