Check out this video for more examples on how QR codes are being used:
To scan a QR Code, you’ll need an Internet-enabled smart phone or other mobile device with a camera and a QR reader (sometimes called a QR scanner).
Mobile-Barcodes.com has a number of different software choices. You can also download the free QR Reader for iPhones in the iTunes store. AT&T has a QR scanner available for iPhones and Android and Blackberry. BeeTagg is also available for iPhones and Android and many other devices.
Creating QR Codes
Want to create your own? To create a QR code, you'll need to use a QR "generator." Some freely available options include Bit.ly, Kaywa, and QR Stuff. Check out this article for more details on creating a QR code and this site for instructions on editing QR codes to include images and text.