Hello all,
If you are into mobile coupons, you should check out Yowza! It's now the third most popular app in the lifestyle section of the app store, and is currently working with Dairy Queen, Saks Fifth Avenue, Sports Authority, and a bunch of local shops and restaurants.
The brochure is available at
http://www.retailsmartguys.com/Yowza.pdf.
Right now, it's super cheap for retailers to get involved. The pricing is in the brochure.