Creating a mobile-optimized site
One of the most important components in an effort that uses QR Codes has to do with the user's experience after they scan.
For the best chance of success, point someone to a mobile-optimized sites.
Mobile-optimized sites will differ from your normal corporate website in a few ways --- there will be less content, less platform-dependent features (i.e. Flash), and the code behind the page will be optimized to fit on the smaller screen.
If you are looking for help creating mobile-optimized sites, we'd absolutely like to refer you to http://iFlyMobi.com
We hope that helps!