You may have already heard, but just in case: J.K. Rowling is starting up a new, interactive website about the Harry Potter books. She is also making the series available in e-book format.
The website will include "elements of computer gaming, social networking, and an online store," according to this news article. Most notably, it will provide 18,000 words' worth of new Harry Potter material, things like background information on the formation of the Hogwarts houses.
Also, the first million people to sign up for the new site will help add to its design beginning July 31. The rest of us can visit the revised site in October.
And yes, you will be able to go to the site and get sorted into a Hogwarts house by the Sorting Hat. I just hope any little kids who are assigned to Slytherin don't pursue the path of eeeee-vil!