A tipster tells us of an unannounced Yahoo reorg, this one affecting the marketing department. Details are scarce, but our first guess: Well-traveled Valley marketer Allen Olivo, who was named acting head of the department after marketing chief Cammie Dunaway left Yahoo for Nintendo. We'd heard Olivo reported to Hillary Schneider when she was in charge of Yahoo's advertising group, but a commenter, below, now says that was never the case. And with Yahoo president Sue Decker naming Schneider, her closest ally in the company, to a new role running the U.S. region, it no longer makes sense for global marketing to report to Schneider — which leaves room for Olivo to make his advancement permanent. That's all speculation, mind you — if you've heard more specifics, let us know.