I have been using Microsoft's tag reader and it is great, especially when you want to create your own tag that points to content. In Tom Khulman's latest blog he has a graphic of an admission ticket to an event in Phoenix . The ticket had a QR Code on it and the code also had a hyperlink which took you to information about the event.
http://www.articulate.com/rapid-elearning/heres-how-to-help-your-subject-matter-experts-build-better-e-learning-courses/ is where the article is and I recommend the article as it talks about working with Subject Matter Experts in an eLearning context.
Back on topic... Microsoft tag reader couldn't read the tag, so I downloaded another reader called mobiletag which is in the app store or you can visit their site at http://www.mobiletag.com.
