Here are a couple of little ideas I came across on the use of QR codes. The first one a is a marketing/customer service application but it could easily be applied to education. The above example is a QR code for Washington State Ferries. How could you use a similar idea? Do you want to survey your students with a simple tool like survey monkey? Why not make the experience a little more interactive. If you are creating a scavenger hunt with QR codes why not embed them in interesting places or inside graphics.
You can even put your codes in the wild to promote your seminar!
Need a resume? Why not make your QR code speak for you!