One such company marketing QR Codes is SPARQCode See the link to see what a code looks like and how it might be used.
I'm now thinking about how we might use the QR Code for emergency management. Imagine your typical Disaster Preparedness Fair. You have your table set up and on the table is a cardboard sign with your QR Code that lets people scan the code and go right to the preparedness section on your website. Or, you are sending information out with the utility bills and all the utility company has to do is have a one sentence line about disaster preparedness and a QR Code that links to your website.
After a disaster you have established a disaster recovery center and people can scan a QR Code that takes them directly to disaster recovery application information and materials.
It looks like a winner to me!