Bungie.net will reboot tomorrow with new features enabled. TeamXbox has an interview with Bungie.net's development lead, Chris Gossett, about the new features.
Tyson "Ferrex" Green has written up the first part of a three-part series on working in Forge, Halo 3's in-game editor. You'll apparently be able to call on a startling variety of objects in the editor; although you won't be able to change map geometry, you'll be able to add objects so large that they will, effectively, change the flow of the map.
And, of course, it's not just editing, it's also a play mode:
Russ Pitts at the escapist has never preordered a game-- until Halo 3, that is.
Gamesindustry.biz reports that Microsoft is expecting to sell out of the Legendary edition of Halo 3, in the US at least.
First of all, this page contains SPOILERS. Do NOT read it unless you want the ending of Halo 3 spoiled for you. This is not appearing on the front page unless you've selected to view spoilers, and I've obscured the text by making it white on a white background; you'll have to highlight it to read. That's as much protection as I can give you.