Yahoo director Roy Bostock was hustled into the chairman's seat the night before Microsoft launched its hostile bid for the company, after Terry Semel quit the post. But the man is literally colorless: All Yahoo's investor-relations site gives us is a black-and-white photo and a brief biography. The bio tells us this much: He's also on the board of Morgan Stanley, which has been wracked like the rest of Wall Street by the subprime crisis, and Northwest Airlines, which is negotiating a merger with Delta. In Silicon Valley, we think of Yahoo as an iconic company. But in the other board rooms Bostock frequents, Yahoo is just a frothy tech stock with a goofy name. Bostock may be chairman, but do you really think he's putting Yahoo at the top of his list?