Yahoo! Search - Competing with Google (Contd.)

Following up on my previous post of how Yahoo! plans to leverage user information to compete with Google on Search, some more info in this interview with Yahoo! representatives.

One of the things mentioned in the interview was that Ken Norton felt that the search offerings will differentiate in the next phase of search engines. While current implementations at Google, Yahoo! and the new MSN search seem to be similar, the distinctions will come up in due time with the research in each of these companies driven by their individual visions - Google wants to "organize the world's information and make it universally accessible," Yahoo!'s calling its search "the engine of possibility," (elsewhere they have also implied that they want their search to be more task-oriented, this fits in with the reference to "understanding the user's intent" in the interview), what is Microsoft's mission?