Okay - so maybe George Lucas is not advising her, but Potter fans will have to become used to this sort of thing if they want the Potter Verse to remain intact in the coming decades. George Lucas and Lucas Film staunchly defend the Star Wars copyrights - and I believe they are right to do so. Without doing so - we wouldn't have new movies, tv shows, and books officially licensed and supporting Star Wars if everyone was taking their piece without paying Daddy Lucas. Potter fans can make books and other items provided Rowling can extend the opportunity and get the licensing stuff in order.
Author J.K. Rowling will tell a judge this week that one of her biggest fans is in fantasyland if he believes a "Harry Potter" encyclopedia he plans to publish does not violate her copyrights.