I don't know how many of you have heard about the site, Pottermore. It's supposed to be a companion to the Harry Potter books, created by JK Rowling herself. You create an account and live out the story. You get sorted, and can chat with other members. Other than that I know very little.
The website opens to the public in October, but there is currently an early registration contest being held. Each day, from now until August 6th, a clue is posted pertaining to one of the books. Solve the clue, and find the quill, and you can register. One million registrants will be accepted for early entry into the site.
How many of you are doing/have done this?
EDIT: Early registration for Pottermore has CLOSED. You can now wait until October to enter.