User blog comment:Henshin86/Olin unmasks new MP features/@comment-4559524-20101031152522

The Guest Sign-in thing is actually pretty cool, although it was in Halo first. But even though BO will have some of the features Halo already has, it will be even better because it's like Halo customization, but the game is Call of Duty. Black Ops will be amazing :)