Kudos to Mark Mezzetta, who pointed out a news item at MacGamer's Ledge describing Bungie's plans for MacWorld San Francisco. In a nutshell:

Bungie Software will be simulcasting a MACWORLD show over the Internet right from their booth and talking about the latest developments in Oni and Halo.

A webcast from Bungie's booth? If nothing else, let's hope the world doesn't end on New Year's Eve just so that we can keep an eye on that one.