As of today, gamers who reserve Call of Duty 4 for the XBOX 360 at GameStop or EBGames will receive a code to get into the beta. If you have reserved the game previously, just go remind them you want your code.

The beta is a lot of fun, and will definately serve to hype you up for November.

Stores nationwide should have received their codes from Activision as of today. So go get yours already!

**UPDATE**

I've double checked, and as of right now it is just the brick and mortar stores. Each store received a pack of slips each with an individual code on it, and with about 100-150 codes per pack.

So it's safe to say these are available for a limited time only.