Your readers should know that there are still pitfalls to avoid. For example, if one crams too much data into a QR Code, the resulting size (usually larger than 33×33) can confuse many phones and reader applications. Print or display size is also an issue, as is the fact that except for Android and Nokia, smartphone software does not include QR Code reading software by default — at least not yet.

Technicalities aside, the real issue is engagement. Just pointing mobile users to a Web site will be a disappointment, unless the site is optimized for limited mobile browsers and their small screens. Some companies, like Warbasse Design (http://www.warbassedesign.com) have figured this out, but there are a lot of marketing companies who don’t.

Thanks for raising awareness.

I can see how they can become very useful.