If you bought Gears of War 2 on day one in order to get a code for a gold Lancer, be prepared to get the shaft. Available on the Xbox Live Marketplace (website only), you can get the gold Lancer for free.
So, first Epic decides to put the Flashback Map Pack up on the marketplace even after they said it would only be available if you purchased a sealed copy of the game. Now the gold lancer is free to everyone.
Am I missing something here?
Anyway, click here to queue up your golden weapon and enjoy!