New commercial airs during Monday Night Football tonight. Registration for beta testers for the multiplayer should be activated shortly thereafter. halo3.com
No gameplay in the commercial. It uses "gameplay resources" in parts which really means, "we wish the game could look like this...but it will still be pretty."
Supposedly, die-hard fans should be able to spot clues about the new game and storyline.
Goes on XBOX Live tonight after the commerical. I'm sure it will start popping up online later this evening as well.
Just passing this along...