Sunnyvale, Calif. - Yahoo will add the former chief executive of Viacom, Frank Biondi Jr., and the former chief executive of Nextel Partners, John Chapple, to its board of directors from a list of nine possible new board members submitted by billionaire investor Carl Icahn. The addition of Biondi Jr. and Chapple is part of an agreement made to ward off a proxy fight with billionaire investor Carl Icahn.