Thanks to everyone who joined the "What's your Gamertag" contest!
Here are the winners :
For the winners, the Xbox Live Arcade promotional codes have been sent to your Xbox Live messaging inbox. Simply input the code via the 'Redeem Code' option on the Xbox Live Marketplace. You can also get the option to redeem the code after downloading the trial version of the game that you won. Simply download the trial version (of whichever game you won), then choose to buy the game....from that point, there should be an option to 'redeem code' which can then let you unlock the full version of the game for free, using the promo code provided.