If you are wondering what Halo Waypoint is and have yet to watch the video, it is basically a stat tracking service on X-box Live which will track achievements and other things from Halo 3, Halo 3 ODST, and Halo Wars and a place to look at Halo related content. The service will allow you to watch the new upcoming Halo anime on it and look at other content that relates to Halo.
It will be available on November 5th for all X-box Live member. Come November 26th though the service will become a X-box Live Gold exclusive. If you want more info definitely check out the video above.