So it is with a great sense of timing that RESFEST makes its annual Bay Area stop, beginning Thursday at the Palace of Fine Arts in San Francisco. Developed in 1996 by the RES Media Group, which focuses on digital filmmaking, RESFEST brings together more than 150 cutting-edge features and short subjects -- narratives, music videos and documentaries -- all made without the aid of traditional celluloid. G. Allen Johnson reports.