I confidently predict this will cause uproar in some circles: Waterstone's has launched an online petition to Save Harry Potter. The site proclaims:
There has never been a place like Hogwarts. There has never been a writer like JK Rowling. And there has never, ever been a character like Harry Potter. Millions, perhaps billions of us love reading his adventures, and we never want them to end.
The professed aim of the site is "to get one million names by July 21st (the launch date for Harry Potter and the Deathly Hallows)" at which point the petition will be presented to J K Rowling, who during a recent interview on the UK chat-show Friday Night With Jonathan Ross apparently agreed that you should "never say 'never'" with regard to the possibility that she might write more fiction set in the Potterverse in future. (You can see something of the JKR interview with Jonathan Ross on YouTube.)