Craig - just thought I'd let you know that this post has created lots of debate in our team. Yesterday we had examples put together and @pete_do_summit and @alanbarn were coming up with mock up ways to implement these codes. Everyone seems to have the QR bug. I think this is mainly due to the ease of creating them. We're having a bit of a competition within our design team to come up with some new designs and I'm sure QR codes will be included in some of the material. I'll let you know how it goes!