The Halo 3 multiplayer beta sign-up is now active at Halo3.com. As previously noted, the beta is anticipated to start in Spring 2007. Users signing up must be 17 years old or older, have an Xbox 360 console with hard drive, an Xbox Live Gold subscription, and have their Microsoft .NET Passport linked to their active gamertag. Right now, the registration server is incredibly slow, so those signing up may have to be a little patient for the server load to drop a bit.

Update: The Halo 3 teaser trailer is now available for download from Microsoft here.