PC World: "Given undistinguished history of Microsoft's late and unlamented Live Search engine, the predecessor to Bing, it's easy to dismiss Redmond as a hapless also-ran in the search market. But given the vast sums of money and resources that Microsoft is investing in its fledging Google challenger, this could change in a hurry.
One new and noteworthy upgrade is the inclusion of search results from Wolfram Alpha, an oddball, "computational knowledge" search tool that's probably too geeky for the average user. When integrated with a mainstream query engine, however, Wolfram Alpha algorithms prove their mettle by returning actionable data rather than just a page of links.
It's debatable whether Bing is gaining market share, however, or simply spinning its wheels. According to online data service Experian Hitwise, Bing's share of U.S. Web searches rose to 9.57 percent in October 2009, up from 8.96 percent in September. Of course, Bing was still a distant third behind Google (70.6 percent) and Yahoo (16.14 percent)."