From Shelf Awareness this morning.
Watch this space dept.: Pottermore.com, a mysterious website featuring "a pink holding page with the description 'coming soon' and Rowling’s signature underneath," has been launched by J.K. Rowling. The Bookseller reported that Pottermore.com has sparked rumors that more Harry Potter novels are on the way, but a spokeswoman for Rowling’s PR company Stone Hill Salt said, "It is not another Harry Potter book but we cannot reveal any more at this stage, fans will have to keep an eye on the website. It will be launching soon."
Ooooo a mystery! We'll let you know more as we hear!