I got the up to 35% RO pin code today via snail mail. I have only been getting snail mail pins for a while now. It is only good until the end of March. I have been religiously saving vacations for the end of Oct 2012, this pin does me no good unfortuneately. Hopefully if I keep saving them I will get one I can use! 
It has to be used before Dec 31 so maybe The begining of Jan we will see a new wave of pin codes!

It has to be used before Dec 31 so maybe The begining of Jan we will see a new wave of pin codes!
. Some ways that may increase your chances: