Avateur pointed out some screenshots at TeamXbox that seem to have been released for the Tokyo Game Show. I've added them to our Halo 3 multiplayer gallery (six shots) and Halo 3 gallery (1 campaign shot). I'll try to get the new ActionClix shots up shortly as well.
Retronauts continues its contributions to 1Up's ongoing Halo 3 coverage by taking a look back at Marathon 2. In case you've been under a rock since July, Freeverse has ported the game to XBLA as Marathon:Durandal.
Thanks to chewpathingy in the HBO forum.
Gamasutra has a story up on some of the audio technology used to make Halo 3. Specifically, real time signal processing software by Waves, called Maxx.
The story contains a short quote from Marty "The Elder" O'Donnell.
Thanks to Anton P. Nym for the heads-up in the HBO forum.