In my last post on the Yahoo!/Bing merger I talked about the partnership announced about a year ago where Microsoft will be powering both organic and paid search for Bing AND Yahoo! It was announced August 24, 2010 that the switch for organic results is official in the US and Canada markets with other markets to soon follow. This is applicable for all natural search results including Web, Image and Video.
In July of 2009 Yahoo! and Microsoft announced a search partnership that would attempt to chip away at the massive market share that Google currently controls of the search market. This is a Battle Royale for a larger slice of the multi-billion-searches-per-month pie, hitting a record the same month of 10.5 billion. Coincidence? Perhaps.