Franchise opportunities with Dunkin’ Donuts are still available in Ottumwa, Iowa. Dunkin’ Donuts has signed a multi-unit store development agreement with existing franchisee, Savoureux Corp., for 12 new restaurants in North Omaha, Neb. and Sioux City, Iowa, with the first restaurant planned to open in 2013. Savoureux Corp. is led by NFL greats and former…