Piracy for books is quite interesting. There is already a lot of infastructure for sharing files (torrent sites et al.), but the new thing is how small books are. 1,000 books could be about the size of one standard def film (~ 1 GB). A lot of people are going to have a lot of books.
I am quite surprised the pirating of eBooks has not taken off. The infrastructure certainly exists, but I'm not aware of any exclusive, prolific communities in a similar vein to music and tv shows/movies.