http://blogs.wsj.com/digits/2010/03/10/target-targets-your-cellphone/
Giant discount retailer Target announced on Wednesday that it was rolling out a program to beam coupons directly to customers’ smartphones. The mobile coupons work just like their old-fashioned paper cousins: the checkout clerk scans them right from a barcode on your cellphone screen.
The retailer claims its advanced point-of-sale technology makes it the first national retailer with the ability to scan mobile barcodes in all of its stores