Quick Response Codes.
Wikipedia describes it as a specific matrix barcode (or two-dimensional code), readable by dedicated QR Barcode reader and camera phones. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be text, URL or other data. Common in Japan, where it was created by Toyota subsidiary Denso-Wave in 1994, the QR code is one of the most popular types of two-dimensional barcodes. QR is the abbreviation for Quick Response, as the creator intended the code to allow its contents to be decoded at high speed.
QR codes can be a great coupon alternative.
Think cross promotions. Say you own a number of restaurants, you can use the QR code on table tops to promote your other restaurant specials.
The opportunities are endless. You will need a QR code scanner. Blackberry has its own scanner and you can find others at, www.scanlife.com or http://www.i-nigma.com/CreateBarcodes.html.
Download and have some fun.
Check this page out and see them in action.