Only at the Austin Film Festival can legendary director-actor-producer Sydney Pollack wander through the 120-year-old Driskill Hotel's grand lobby entirely unmolested while "Mystic River" screenwriter Brian Helgeland gets mobbed by fans. As one repeat attendee put it, "This is the only festival where writers are treated like rock stars." The lively event, which will close its 13th incarnation on Thursday, remains the only major screenwriter-focused festival on the circuit. The weeklong array of panels, pitch competitions, parties and screenings is all about honoring the ingenuity and allure of the screenplay and the writers who craft them. Jay A. Fernandez reports.