As the first of two Apple adapters designed to convert prior 30-Pin Dock Connector accessories for use with Lightning-equipped iPhones, iPods, and iPads, the Lightning to 30-Pin Adapter ($29) has arrived -- and it's much smaller than might have been guessed from Apple's official photographs. The white plastic housing is only a little larger than two recent Dock Connector plugs stacked atop each other, with identical thickness and with. Not surprisingly,…