In a shift that is sure to be much commented on by the advertising industry, Yahoo has tapped Goodby, Silverstein & Partners to take the lead for its creative, advertising, digital marketing and strategic planning efforts.The San Francisco-based Goodby, which is owned by the Omnicom Group, is known for innovative ideas and has done such memorable campaigns as the terrific ""Got Milk?" campaign.Perhaps a "Got Yahoo?" campaign is in the future? Until now, the top job of goosing Yahoo's tarnished brand, as part of a recently launched $100 million marketing push, has been helmed by Ogilvy & Mather.