BEST SUPPORTING ACTRESS Lorena Diaz Diaz, a resourceful actress with extensive range, delivered an outrageous, over-the-top performance in Betty's Summer Vacation (a Christopher Durang satire) as Mrs. Siezmagraff, the lunatic landlady from hell. Diaz was as fearless as she was shameless, creating a nightmarish cartoon of a character that ran away with this Mad Cat Theatre show, no minor accomplishment among a cast of real clowns. If there's any negative about Diaz's work, it's that it isn't seen often enough.