Bing gaining market share?
 

Bing recently announced significant growth. Odds are they are taking business from Google rather than Yahoo (Yahoo doesn't have much to give). One has to wonder if the product placement going on in Hollywood movies is making a small impact here (i.e., you will notice a lot of people in movies using Bing has their search engine). Bing pays a handsome fee for this, but there is evidence to suggest it works.