In a recent post on the Yahoo! Search Blog, they announced that they’ve begun a test incorporating Microsoft’s Bing search results in their pages.  They are displaying both natural and paid search results, but only in about 25 percent of Yahoo’s search results pages.  Here’s what you can expect to see:

Further, Yahoo! says their mobile search product will begin to incorporate Bing mobile search results in the coming weeks and months.  Notable is Yahoo’s assertion that they will “continue to innovate and enhance the overall consumer experience around those core listings.”  This means that while the search results themselves will be generated by Bing, other on-page features or enhancements will be driven by the Yahoo! Search team.

For this and other reasons, you will continue to see how your keywords rank in natural search results across Google, Yahoo! and Bing throughout and following completion of the Yahoo!-Bing search integration within the Yield Web Marketing Suite and our Natural Search Optimizer.  It is entirely possible that your keywords may rank slightly differently across Yahoo! and Bing based on a variety of factors throughout the integration process.