You see in some ways this is what makes Apple a better company then Google and Microsoft. Apple is perfectly happy with teaming up with others to provide its users' service. It doesn't have to own every service it provides. Further, why team up with Yahoo, when Yahoo uses Bing's search engine? Bing also is a good search engine for 90 percent of what I imagine people search for. It isn't as good as Google for more technical stuff, but that will change.