Retrofit from earlier Tradition-branded cases, Noreve's Tradition Leather Case for iPhone 3G ($50-60) is a plain flip-style case made with higher than typical quality leather. The suede-styled "Vintage" leather shown here is the more expensive version; 15 colors can be selected from. Each of the Tradition cases comes with a detachable rear belt clip, a metal nub, and a screwdriver for installation. When closed, Tradition precludes access to the iPhone…