Google are experimenting with QR codes for Print Ads. Recent newspaper ads for jewelry retailer Blue Nile have all the usual response mechanisms; URL, search terms, phone number, coupon code, SMS code but now also include a 2D barcode. Users are taken to a transcoded version of the full web site.
Update January 20, 2009
Spencer Spinnell, Director of Google Print Ads announces that they will stop offering Print Ads on February 28 2009.