WKAT-AM (1360) will launch a Christian talk and teaching format on Jan. 1 with a lineup of popular ministry programs. ''Since entering Miami in 2005, we have looked for an opportunity to offer South Florida listeners quality Christian talk programming,'' said Joe D. Davis, executive vice president of California-based Salem Communications, corporate owner of WKAT. Shows will touch on issues such as relationships and family concerns, as well as Biblical faith. Hosts include James Dobson and Pastor Chuck Swindoll.