American Artifact world premieres tonight with two showings at the Red Vic Theatre on Haight Street, 5pm and 7pm. If only everything about this movie were as cool as that Cheetah wearing sunglasses. Director Merle Becker's debut documentary has its heart in the right place, and the filmmaker's passion for posters bleeds from every frame, but American Artifact fails at the crucial task of transmitting this enthusiasm to its audience. Becker thinks we might be made interested in rock posters, and, indeed, we might, but her answer to the question "why should I be interested in rock posters?" seems mostly [...]