Bungiealso confirms how the beta passes that ship withCrackdownwill work:
When theHalo 3multiplayer beta surfaces in spring 2007, those owners ofCrackdownthat have access to an Xbox 360 Pro console or an Xbox 360 Core console with hard drive and a valid Xbox Live Gold subscription simply need to load their copy ofCrackdowninto Xbox 360 and use the disc as a key to download the beta from Xbox Live Marketplace and join the battle inHalo 3multiplayer.
So it’s official — the disc is the key. And for those of you who were thinking about returning/selling your copy ofCrackdownimmediately, it looks like you’ll be holding on to your discs until late March. Cue the sound of a toilet flushing, as the chances of finding a used copy ofCrackdownin February circle down the drain.