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Hi, totally agree with 128K, great resource there, but here is also something interesting to add in the mix: Bing gets data from the results that people click on the Google SERPs when using Internet Explorer... in other words: Bing copies Google http://googleblog.blogspot.com/2011/02/microsofts-bing-uses-google-search.html In the long run they both be looking at the same signals, so the times of optimizing differently for both are pretty much over.