In a case of Internet espionage that makes the antics of double agent Cold War operatives seem like frivolous child play, Bing has been caught stealing search results from Google with its Bing toolbar and IE8's Suggested Sites feature.
Google first suspected foul play in May 2010. By October 2010, with Bing results beginning to look uncannily like Google's, it knew something had to be done about it -- and so, in true, nerdtastic style, Google set up a sting to prove that Microsoft was actually behind the wholesale mimicry of Google's search results.
One of Google's 'sting' queries
A few days later, the same result on Bing
Google injected "synthetic" results into its search engine -- fake queries and results that no real user or engine would ever generate. Then, on D-Day, December 17, about 20 Google engineers were asked to run the test queries with Internet Explorer 8, Bing Bar and Suggested Sites. By December 31, some of these fake results began appearing on Bing. See the examples after the break -- it's damning.
News Source : Google News