Business Week reports that Apple and Microsoft have been discussing making Bing the default search engine on the iPhone. In light of accelerating rivalry between Apple and Google over the mobile market it does make sense. Some sources suggest that Apple is working on its own search solution and the Bing deal might be just a move that buys Apple some time. It doesn’t look like any deal between any of these three companies will live long. Each has its own Mobile OS, Mobile Ad agency, and two of them have their own devices.