At my new office, housed at the Dublin Technology Center, we've hung a lot of art from students and staff from around our district. We've incorporated QR Codes with the art. Let me explain what we've done. First, we've created a Wiki to display art, as well as information about the artist. So the QR Code attached to the picture takes you to the Wiki on your portable device. That is illustrated in the picture below. Two pieces of art with QR Codes about their authors.
Second, we have created actual art using the QR Code, which takes you to a digital piece of art. Those pieces live in the Wiki Art Gallery, but the actual pieces don't live in the Technology Center. This way we can link to videos, that couldn't be displayed on the wall.
Lastly, we've created book trailers and can rotate which books are highlighted. We can change the book that lives on the page that is asssociated with the QR Code.
Here are some awesome ways to use QR Codes. Most of our QR Codes are made with QR Stuff. It allows you to change colors of the code. Really nice. Give them a try.