It's been 5 years since Halo made it's debut on the Xbox. Bungie just made some huge announcements that I'm excited about. http://www.bungie.net/News/TopStory.aspx?cid=9182
First, on December 4 during Monday Night Football (ESPN), there is going to be a Halo 3 commercial. This commercial will not feature game play, but it will be created by Digital Domain and utilizes Halo models and assets to create a photo realistic "movie" of Halo characters. It should be cool, but it will not give any clues to the gameplay of Halo 3.
Second, Halo 2 is getting 2 new maps. It will be available in the spring and will only work on the Xbox 360. Since I have one, I'm excited about this, but it will cost money.
Third, Halo 3 beta is going to be available on the Xbox 360 in the spring and will allow gamers the opportunity to preview Halo 3's online multiplayer and allows Bungie to insure that Halo 3's online gaming will work correctly.
Other than a publish date, this is good news. It appears that Halo 3 won't be available for at least another year, but it's not forgotten.