DLO has announced that it is adding brown leather and black nylon variations to its line of HipCases for iPhone. Both the brown leather and black nylon HipCases feature a horizontal design, with a velcro flap and center notch cut-out for easy removal of the iPhone. While the brown leather version is feature-identical to the black leather model, the black nylon case adds an interior pocket for essential items like credit cards and cash. The HipCase…