Microsoft's share of U.S. searches jumped 22.1% in August to 10.7% of the market to Google's 64.6%, up 2.6%, and Yahoo's 16%, according to Nielsen. Yahoo was down 4.2%. Microsoft was up from 9% in July. That's a sequential leap of 22.1% for Microsoft's newfangled Bing search machine, backed by a $100 million marketing budget. Microsoft hasn't begun to spend that kind of money overseas yet promoting the widgetry. It does have HP and Lenovo PCs defaulting to Bing.