I found on a forum I read (Mobilread.com) a link to this funny blog post. It was written in regard to an article in Publishers Weekly speculating that publishers are losing about 3 billion dollars per year in pirated book sales (which is probably over-estimated, I think).
Anyway, you have to read the blog. It gives me a new job title instead of librarian. I am now a trafficker.
http://go-to-hellman.blogspot.com/2010/01/offline-book-lending-costs-us.html