For those of you that have pre ordered but have not received the beta key:
Dear Customer,
Thank you for contacting GameStop.com regarding your Call of Duty: World at War beta code.
If you have reserved the game at your local store, we have a website available to allow you to enter in your reservation information to receive a code if you have not already received one. Receipt information is required to verify that you reserved the game with GameStop/EBgames.
The code should be emailed within 2 business days. Please visit the following link for further assistance:
http://www.gamestop.com/codbeta