Ballistic has provided iLounge with a preview of its upcoming Ballistic LS case for the iPhone 4. Made from TPU material, the Ballistic LS features four interchangeable silicone “Ballistic Corners,” which vary in color and thickness to allow for a customized level of drop protection, as well as push-through protection for the volume and sleep/wake buttons, and open access to all other ports, controls, and cameras. The Ballistic LS…