From the features list in the App Directory:
- The ability to order from almost any Domino’s in the U.S. (Nearly 5,000 locations)
- Access to all the items on our national menu. · Find coupons available for use at your selected store.
- The app will remember your most recent store and other useful information.
- Sign in to your Pizza Profile to access your saved addresses and credit cards, or you may order as a guest.
- Use Domino’s Tracker® to follow your order from the moment you place it until it’s out of the oven, ready for pickup or delivery
- Use Windows Phone 8 speech recognition to select your favorite Domino's items.
I've used the Dominos UK app a number of times in the last year, and it's really rewarding to have an application that has a physical reward at the end of it. That the reward is pizza is salve to a working developer's heart. I suspect they went through a lot of pizza while they were doing the beta testing.
US Windows Phone users can download the app for free right now.