Bungie released another new video today. This one featuring the developers providing a commentary and walkthrough to a portion of the campaign entitled "Tip of the Spear".
Be warned: if you wish to remain a virgin for the campaign, do not watch the video and do note read the comments in the thread. No complaining about spoilers in this thread.
Tip of the Spear is the 5th mission in Halo: Reach.
Halo: Reach is out sometime in the near future. I'm sure someone has screamed the number of days remaining somewhere you've looked. Oh yes, it is on your dashboard too watching you!
Tick... tick... BOOM.