Using QR Codes for Mobile Marketing

Check out this great article from Mashable on how to use QR Codes for marketing.

I am working with a team this summer to create a mobile app for Maritz and using QR Codes is a key feature. With the move to mobile, these handy little bar codes will be everywhere in the next few years (until they come up with something better).

What do you think of QR Codes? Have you ever used them for marketing?