Sunnyvale, Calif.—Cammie Dunaway, CMO and head of the customer experience division at Yahoo, is leaving the company. Her last day will be Nov. 2, and a search for a successor is under way. Dunaway joined Yahoo as CMO in 2003. Under her leadership, Yahoo was named Marketer of the Year by the Direct Marketing Association last year. It also won a Gold Reggie Award from the Promotional Marketing Association last year.