They are just handing them out now

Welcome to the Bungie Friends & Family Halo 3 beta!

In order to play the Halo 3 Multiplayer Beta, you will need an Xbox 360 with a hard drive and an Xbox LIVE Gold account.

Your beta download code is: UGETTOKIKYEMSASSINHALO3

This code will allow you to download the Halo 3 Beta to one Xbox 360 console, one time.

Instructions for installing and launching the beta are below:

1. Turn on your Xbox 360 and sign-in with your Xbox LIVE Gold account
2. Select “Marketplace” from the Xbox LIVE dashboard
3. Select the “Redeem Code” option
4. Enter a beta download code
5. Once the download completes, navigate to the “Games” blade of the dashboard
6. Select “Demos and More”
7. Select and launch the Halo 3 Multiplayer Beta!

The initial download may take some time depending on network traffic and your own internet connection. Please be patient.

Please note that the Halo 3 beta only supports Matchmaking play over Xbox Live. You will not be able to play any custom games or play in offline/system link matches. You can, however, play with a friend in split-screen games in the Social playlists.

You can visit our website and interact with other beta participants and leave feedback for Bungie in our forum located at http://www.bungie.net/Forums/Halo3Beta. This forum will be active as of Friday 5/11. Staring Tuesday, 5/15, we will have a wealth of information available to give you an edge against the online competition. Bungie.net will also give you a chance to review a sampling of post-game statistics from the matches you play online.

If you have problems or need assistance please visit the Bungie.net forum listed above. Do not respond this message, the Soul isn't listening.

Thank you and have fun playing the Halo 3 Multiplayer Beta!

Sincerely,
The Bungie Team