Want to play the C&C 4 Beta NOW? here is what you need to do.
1. Visit C&C 4 Gamespot Beta page, here
2. If you are not logged in, you are prompted to log in to your free GameSpot account, or register for one.
3. Once you are logged in, you will see registration fields already populated for you, based on your GS profile. Just hit Submit.
4. The page now includes new information, including your key (the URL), and instructions on what to do.
5. If Gamespot is temporarily out of keys, DO NOT WORRY, you will be placed on a short waitlist if necessary. You do not need to re-register. Once Gamespot releases more keys, you will be assigned a key in the order you joined the waitlist. Your own key is displayed on the page, as well as sent to you by email.