Yahoo has let advertisers in the US know they are testing Bing search results. They have been testing offline for a while but word they will doing some live testing now. It will be a while before the switch is made in Australia, I’d be surprised if it happened this year. The question will be what market share will Bing be able to take of Google, lets hope it is a decent chunk. However the reality is Bing is Microsoft and they have a serious image problem.