Muggles mark your calendars.  The much-anticipated Harry Potter attraction at Universal Studios Florida has an opening date.  The Wizarding World of Harry Potter - Diagon Alley will welcome muggles, squibs, wizards and others to the 20-acre themed park starting July 8th.  Featuring a Harry Potter roller coaster, 3D attractions and shops and restaurants, Diagon Alley is an expansion of the original Wizarding World - Hogsmeade, which opened four years ago at nearby Universal's Islands of Adventure.  The theme parks will be joined by the Hogwarts Express train, as noted in J.K. Rowling's Harry Potter book series. More information about tickets and admission can be found on the Universal Orlando website.