So I was messaged this by a friend on Playstation 3, and it works.
Pretty much. you go to http://au.gamespot.com/event/codes/command-conquer-4-open/
and sign in to sign up for the beta of Command and Conquer 4: Tiberian Twilight.
Once you have done that, you are given a 16-digit, hexadecimal key to enter on the EA website. Instead of going to the C&C4 website, go to http://medalofhonor.com/en_GB/beta
Log in with an EA account, enter your C&C4 code and tell it how you would like to play the beta and where you are from. It will then throw out a PSN Store Code or PC code and instructions on how to redeem.
Am well looking forward to this game. Hope to see you all on the BETA soon.
You can get into the beta on the 17th if you own Battlefield: Bad Company 2. Otherwise its 21st, and I don't know when it ends.