Call of Duty 4 LIVE Fire Play and Win Sweepstakes

Register your Gamertag here – once you get to this link, click Register your Gamertag.
It starts at 12:01AM EDT (11:01PM CST) on Friday, April 18 and ends 11:59PM (10:59PM CST) on Sunday, April 20. More details located here.
One Grand Prize package:

    * Xbox 360 Elite system
    * An Xbox 360 VIP Accessories Kit
    * A Call of Duty 4 Gift Bag containing a COD 4 water bottle and an autographed Call of Duty 4 art book from the Limited Collector’s Edition of the game
    * 12-Month Xbox LIVE Gold subscription

Seventy-two Hourly First Prize packages:

    * Limited-Edition Call of Duty 4 T-shirt
    * Limited Edition Call of Duty 4 poster signed by the Infinity Ward team
    * 4000 Microsoft Points