ENTERTAINMENT

Viacom, AT&T; Team Up for Interactive TV: American Telephone & Telegraph Co. and Viacom International Inc., the cable TV company whose networks include MTV and Nickelodeon, formed a partnership to bring interactive TV to a small cable system in the San Francisco Bay Area. While neither company will invest in the other, they said the trial of video-on-demand services in 1,000 homes in Castro Valley will be a proving ground for future multimedia services. Essentially, Viacom Cable customers will get new set-top boxes and computerized TVs that will allow them to order network or cable channels, video games, special films, news and sports events.