Rafat Ali's Paid Content has a good weekend scoop on Yahoo: the beleaguered internet giant has just lost the head of its sales group, Wenda Millard. It's no exaggeration to say that Yahoo's leadership is in turmoil: it has now lost 10 of the 26 execs listed on its management page a year ago. The Sunnyvale internet industry pioneer is still looking for a replacement for CTO Zod Nazem; it never found the product visionary for its stillborn "audience" group; Sue Decker's failure to get the chief exec slot, vacated by Terry Semel, must make her question her own prospects; and most observers doubt Jerry Yang's ability to lead the company as CEO as anything more than a stopgap. What a mess. As the company's chief sales officer, Millard oversaw the growth in display advertising; she is joining Martha Stewart Living Omnimedia. Yahoo has indicated that, while it sees healthy advertiser demand for text ads around search results, the revenues from these graphical units have softened; so Millard may be moving before her gloss wears off; or simply having lost a power play. Whatever: Yahoo, which had relied on brand advertising to make up for its defeat by Google in paid search, is left in the lurch.