Yahoo (NSDQ: YHOO), sensing Microsoft’s desperation to capitalize on its Bing launch, has driven a hard bargain, it seems: it will be able to keep 110 percent of revenues it generates across all of Yahoo and Microsoft (NSDQ: MSFT) search properties, reports Kara. Then in the third year, it will get to keep 90 percent. No word on whether there are any revenue guarantees BY MSFT across its properties, but it isn’t paying any upfront cost for it. What Yahoo gets is several billion dollars over those three years, as a result of selling all that inventory. Lotsa responsibilities now lie with Hilary Schneider and her team, including Joanne Bradford, to make this work on the ad side….