News/talk station WGST-AM (640) dumped its entire local personality staff Tuesday, including veteran talk-show hosts Tom Hughes and Kim "The Kimmer" Peterson. Starting Tuesday afternoon, the station began airing syndicated personalities from out of town, a much cheaper alternative for a station whose ratings and revenues have dropped precipitously in recent years. WGST ranked 20th in the Atlanta market among listeners 25 to 54 over the summer, according to Arbitron. Management is keeping only syndicated giant Rush Limbaugh in its daytime lineup. Limbaugh, the nation's biggest talk-show personality, has the only program pulling in passable ratings at WGST. "We haven't...