St Astier is a structural repair specialist covering the North of England. The have added QR codes to their web pages, but only when the webpage is printed! 

Phil Brown; “Its not really innovative – more assistive – but following a great article in .net magazine, we’re using QR codes on individual blog posts. Only visible when printed or print previewed, they provide a convenient means for those who receive or generate printed material from our site to link back to the original post. Very easy to implement through Google’s Chart API. Try it from our latest post – http://www.st-astier.co.uk/blog/making-work-placements-work”