Having unveiled the designs earlier this year at CES, Incipio has continued to release innovative new iPhone 4 cases in the forms of Delta ($35) and Step ($35). Delta is a hybrid of hard plastic and silicone rubber cases, using the plastic as a frame and the rubber as a protector for the majority of the iPhone 4's body, uniquely employing two-tone, multi-textured rubber for the case and a soft touch finish to the plastic frame to achieve a distinctive…
