GRAND RAPIDS, Mich. — For more than one year, an inexpensive, independently produced, PG-rated movie with a simple story about the importance of love and family has packed audiences of all ages into a single theater here. "People show up every day for 'Uncle Nino,' " said Ron Van Timmeren, an executive vice president for Celebration Cinema, the regional, family owned movie chain that began running the film at one of its multiplexes on Dec. 5, 2003. Now, the local phenomenon has landed a nationwide distributor — the same one that helped put out "My Big Fat Greek Wedding" and...