Marware has introduced its new MicroShell case for the iPhone 3G and iPhone 3GS. Measuring less than 1mm thick, MicroShell is a low-profile case featuring a half-shell design that protects the rear and sides of the iPhone while offering full access to all ports, buttons, and controls. Available in seven metallic colors, it also comes with a clear screen protector and cleaning cloth. Marware’s MicroShell case for the iPhone 3G and iPhone 3GS…