The war in the search engine market has evolved from a contest of speed and scale to one of innovation. Google, Microsoft and Yahoo have all tied in with Twitter for real-time search. Google and Bing are also focusing on visual search, although the two define that term differently. In addition, Bing has teamed up with Wolfram Alpha in the math and health areas. Google fired the latest shot in the innovation wars with its announcement Thursday that users of the Google Search Appliance can now call up tweets next to their internal search results.
