One day after the surprise launch of the Retina iPad mini, small amounts of stock of the cellular-capable models of the device have begun trickling into Apple's U.S. retail stores. The company has been offering Personal Pickup of online orders since yesterday, but until now that service has been limited to Wi-Fi models. Model selection is currently very limited and many stores have yet to show any available cellular models, but availability should improve over time as Apple delivers more stock to its stores. While A
