Marware and Belkin have announced their new cases for the iPhone 4. Marware’s lineup includes updated versions of past cases, including the SportShell Convertible for $45 and CEO Premiere for $35, as well as the new CustomShell, a polycarbonate case with a clear window on the back to allow for user customization that sells for $30. Belkin’s new offerings include Grip cases like the textured Grip Ergo for $25, Shield cases like the Shield…
