Naming Names: Elizabeth Taylor will supply the voice of baby Maggie when Maggie finally speaks on the Dec. 3 episode of "The Simpsons" on Fox. . . . CNN is shifting Wolf Blitzer from covering military affairs to senior White House correspondent. Blitzer, a familiar face during the network's coverage of the Gulf War, will replace Charles Bierbauer, who has been promoted to the newly created position of senior Washington correspondent.