And, according to sources, the lodestone of two internal projects aimed at building a viable mobile search engine and monetization platform is to convince Apple to make Yahoo the default search engine on its Safari browser on the iPhone and iPad. link
If this comes true, very soon you might be using Yahoo! Search on your iPhones. But I hope Apple will at least gives us the option to choose the search provider because when it comes to search, no one has yet provided a better results than Google. Furthermore, this might also affect the user experience which is not the way Apple does things.