Over at halo.bungie.org, Marty O'Donnell posted this on the forum, concerning the Halo E3 trailer and whether or not it will be playable on Macs:

I'm looking at it right now on my Powerbook. Don't worry.

So there. And just you wait--one day, Rampancy will have at least one Bungie employee visit our forum! We'll show you! We'll show you all!