More than 500 midnight shows are already sold out for tomorrow night, as Summit Entertainment and its exhibitors decided to add hundreds of midnight screenings of the film in advance of Friday's official opening because of fan demand. And the fans? They are demand-y. Fans came from as far away as Honduras to catch a glimpse of the film's stars, and I'll take the under on whether or not the folks down in Honduras could hear all the screaming. The self-described "fanpires" will likely pack theaters this weekend, and the opening weekend take is anybody's guess. According to the film's director, Catherine Hardwicke, the film must make at least $150 million in order to finance a sequel, due to the second book's extensive werewolf and other special-effects heavy scenes. If the midnight screenings and frenzied fan excitement is any indication, my guess is that they'll probably be able to start filming by the end of the month.