Yeah, I ran across that article before starting. To me it looks like all of their examples (and most custom QR codes in general) are the result of photoshop effort and I haven't yet found a QR Code generator that offers customization or branding besides overlaying a small image on the the code. This was just a learning exercise / excuse to play with CoffeeScript, but I thought it turned out well enough to share.
See here (or google 'artistic qr codes') for more: http://mashable.com/2011/04/18/qr-code-design-tips/