Microsoft and Yahoo have released a new video illustrating how the two companies intend to create a "powerful new choice in search" with their Search Alliance, due to begin making its way to customers before the end of the year. There is not much in the way of news about the alliance to come from the video, but it does put its goal into a simple, easy-to-understand 2 minutes without going into all of the specifics. On the site for the Search Alliance ,