We are currenlty investigating the use of QR codes to be used in learning and teaching and other practical applications around campus (eg, directions).
QR codes are similar to 1-dimensional barcodes. Information held within the code can be transmitted immediately to a mobile phone using the camera function and software to translate the code.
If you're interested in participating or sharing ideas, there is a community wiki at http://mo-tech.wetpaint.com/ (external link).