If you were waiting for J.K. Rowling to announce another Harry Potter book, you'll be disappointed.  Her big announcement yesterday wasn't about a new book but a new website, Pottermore.   In a video, Rowling described Pottermore as "an online reading experience unlike any other... It's the same story with a few crucial additions."  Built around the Potter books, the site will combine social networking elements and a game-like world with a number of features, such as e-books and additional information she says she's "been hoarding for years."  It launches in October.

Watch J.K. Rowling announce Pottermore