<< On April 30th, we received an e-mail from the folks at Microsoft AdCenter informing us of some changes to their terms of service. Included in the changes were:

   * Microsoft may use matching criteria other than keyword searches to display your advertisements.
   * Microsoft may display your advertisements on its network of advertising channels operated by the Microsoft network of participating Web sites and other distribution outlets. >>

http://searchenginewatch.com/showPage.html?page=3625778