More great things for you from our guys at GDC 2013 at the Gearbox Borderlands 2 talk, "Designing Humor in Borderlands 2"! Check the image below for a free ingame gun!
Many Bonerfart's were mentioned....
Update: Anthony did imply that the keys were for a gun but after testing you get a single golden key, not bad as the keys should last a while.
Did you get the gun? Lets us know in the comments what you got!