Following the start of orders for the Retina iPad mini a few hours ago, Apple has issued a press release officially announcing the launch. The release notes that the Retina iPad mini will not only be available for online orders, but also through the in-store Personal Pickup mechanism by which customers can check stocks at their local Apple retail stores and purchase online before heading to their stores to pick up their orders. Stocks of the Retina iPad mini have apparently yet to make their way to Apple's U.S. retail stores, as all stores are currently showing no availabi