Noreve has introduced three new cases for the iPhone 3G. The Tradition is a leather case featuring open access to all ports and controls, a flip-down front cover with magnetic closure and a credit card slot, and a removable swiveling metal belt clip. It is available in a variety of colors and sells for $50. Noreve’s Tradition B is an open-faced, padded form-fitting leather case that offers open access to all ports and controls, and a magnetic…