Networks set September 9 for Katrina telethon Fri Sep 2, 2005 07:38 PM ET LOS ANGELES (Reuters) - The six major U.S. television networks agreed on Friday to a September 9 air date for a rare joint broadcast of a live, all-star charity concert to raise money for survivors of Hurricane Katrina. No details on talent were immediately unveiled for the show, dubbed "Shelter from the Storm: A Concert for the Gulf Coast." But plans call for an hourlong, commercial-free special featuring musical performances and appearances by leading entertainers appealing for cash donations to the hurricane relief effort. The stars...