According to a post on a Hispanic blog, the latest Harry Potter is already available online, both the book and an audio version of it (read by a human no less)
As the original post is in Spanish I'm providing my own translation below:
It took 12 hours for the fans of Harry Potter to publish an illegal electronic version of Harry Potter and the Half-Blood Prince, the latest and much awaited book about the young wizard written by JK Rowling. The process consists of scanning in the book's pages and digitising them using OCR software (Optical Character Recognition). After they proceed to the page by page revision (which is shared out) to ensure there are no errors before publishing it online. If this wasn't enough there is also an audio version of the book available on filesharing networks, read by a human not software. Why does this happen? the problem, for both the publisher and the author, is that being part of the information society is that if you don't make your work available and provide the required facilities, then someone else will. Not only will it happen,. but groups organise themselves in order to get them out as quickly as possible, as happened with the latest Harry Potter
Out of curiosity was the last paragraph of the book that I posted last week correct? If so it was out much earlier than the linked post indicates (ie. even pre-Canada pre-release :) )
I'd have to check :)