I think for those who critisize Rowling, here is a message. What other author has captivated the entire world recently; transcending ages, races, and mindsets? Sure some of you may argue Twilight, but to me the books have gotten much criticism for teens, and seems only popular with teenaged girls.
The world that Rowling has created is so filled with stories that have yet to be told; the year's of Voldemort's power, Tom Riddle, Harry's parents, Dumbledore - and that's just at Hogwarts, there are so many other parts of the wizarding world that were mentioned but never fully elaborated that could come into fruition. The possibilities for sequels, and prequels are endless.
What other author has people on ATRL with avatars of their characters?