CANTON, Mass., April 5, 2011—Dunkin’ Donuts, America’s all-day, everyday stop for coffee and baked goods, unveiled today a new loyalty program offering guests unlimited rewards just for enjoying their favorite Dunkin’ Donuts food and beverages. The new “DD Perks® Rewards” program, the brand’s first-ever national loyalty rewards program, offers “Dunkin’ Dollar” reward coupons for purchases made with a registered Dunkin’ Donuts Card. Dunkin’ Dollars can be....