Two items of note: Bungie has posted the Day 3 bTV footage at their bTV Archive, filling in another gap for those of you who missed the original broadcast. The files come in big and bigger, so fellow modem users out there might want to queue up these downloads for an overnight session.
Second, JosephAW has posted some compressed and trimmed Halo only footage from aforementioned Day 3 broadcast at his comprehensive bTV archive site. I've only just now started downloading it (it's only 4 megs!), so I'll have to reserve comment for later. You fat pipe bastages, though, are welcomed to offer your comments: