I sent my first text last week when I read about it on here and I won today too! Put the code in my Xbox to make sure and there was 400 free points for me, awesome!
I went through all my Xbox 360 games and dug out the 48-hour codes. Here's 2 codes for someone out there since I don't need them...
XDX48-6CR8P-VK3R9-RYKT6-2D46Y
R86T8-FYCHC-CQWDQ-7Y8VW-BJ82B