We'll be on scene and reporting live from all of today's festivities, beginning with Microsoft's Xbox 360 E309 Media Briefing, which kicks off here at 10:25 AM PDT. Rumored announcements include a new Halo game, referred to as Halo: Reach, and a motion-senstive camera peripheral said to track player movement in 3D space.

Following that are conferences from publishers Electronic Arts and Ubisoft, so be sure to keep an eye on Shacknews--especially our dedicated E3 2009 section--throughout the day for the latest. And don't forget to check out our Twitter for bite-sized updates!