COD4Forums.com have just posted a link to the first beta/demo period of COD4 in which you can be flown to LA to test the much anticipated game COD4.
Here is what GameStop have to say about there recent sweepstake:
"You want to be amongst the first to try COD4: Modern Warfare? Then you just might have a chanse now! Fifty winners of Gamestop.com online sweepstakes will be flown to Call of Duty HQ in LA. There you will be able to visit Infinity Ward's territory, go behind the scenes, meet the team and play one of the most highly anticipated games of the year!"
Use promotional code: ONLINE