The San Francisco International Asian American Film Festival unwrapped the titles for its 25th festival March 15-25. This year's 125 films follow the festival's growth from 13 films in 1982 in the wake of Wayne Wang's "Chang is Missing." An audience of 30,000 is expected, and the festival features a new home base. The festival's juried feature competition offers four world premieres: Desmond Nakano's "The American Pastime," Juwan Chung's "Baby," Kern Konwiser and David Ren's "Shanghai Kiss," and Joy Dietrich's "Tie a Yellow Ribbon." Susan Gerhard reports.