Another chart I found interesting is this one comparing Bing and Yahoo! Honestly, I never use Yahoo! anymore unless I am using it to log into another site that uses my Yahoo! ID so I’m really not seeing the relevance of Bing vs Yahoo!
The article that goes with the chart can be found here: http://www.businessinsider.com/chart-of-the-day-bing-could-catch-yahoo-by-the-end-of-the-year-2010-1