Apple's iPhone 5c silicone cases have begun arriving to pre-order customers according to MacRumors tipsters. iLounge has also received its review unit. From iLounge: The silicone rubber case is lined with microfiber on the inside, and includes Sleep/Wake and volume button protection. It's quite light, with the empty space left by a 5 x 7 grid of 5/16" holes helping to keep the weight down, while also oddly exposing only portions of the iPhone 5c's rear labeling.Though many of the iPhone 5c models are still available for delivery on Friday, iPhone 5c cases