We really hope the PS3 controller is not as scratch prone as the console itself, but after standing in the line for hours to get one you surely would not chances. Here is the Silicon Sleeve cover from a rather unknown manufacturer Pega. The silicon case is 0.7 mm thick and covers everything except the buttons and analog stick. However more than protection the case provides an excellent grip once your palms start to sweat after hours of gaming.

The Silicon sleeve cover is available in Japan for 980 Yen ($ 8)