The challenge: Increase your gamerscore by 1,500 between February 12 and April 12, 2007.
The reward:
Level 1 (Gamers who have an annual gamerscore between 0-4,999 at time of entry): Game Picture, Dashboard theme, Contra for Xbox LIVE Arcade
Level 2 (5,000-9,999 annual gamerscore): Level 1 Package, 100 Microsoft Points and a contest T-shirt
Level 3 (10,000+ annual gamerscore): Level 1 Package, 200 Microsoft Points, contest T-shirt and Fusion Frenzy 2
In order to participate, you need to have a valid Windows Live ID with your Xbox LIVE gamercard linked, be a legal resident of the 50 United States and District of Columbia (expect future challenges to be global in scope) and at least thirteen years-old.
Be sure to log on to www.xbox.com/rewards on February 12 to sign up for participation. Reward quantities are limited so gamers who reach the set goal will be awarded on a first come, first served basis only.
here is the link: team xbox