I need to thank Ryan Eldridge of FPMSI (Fulfillment, Print & Mail Solutions, Inc.) for sharing this QR Code story with me.
While playing the game Borderlands on Playstation 3, Ryan spotted QR Codes on a wall inside their game. He did a bit of research and shared this article as well.
I dug a bit further today and found a larger picture of the QR Codes. Some of them resolve to text messages, others take you to websites about the game.