Bing is incorporating wolfram alpha curated data into its database. That's great if you're looking for what is 2^2^2^2^2^2^ and other stuff but what about the future of commercialized keywords. I'm sure many webmasters currently making $$$ off Bing's more forgiving algorithm would want to know. see:
http://www.bing.com/community/blogs/...e-answers.aspx