Apple seems to delight in making both its devices and accessories as small as possible, so the fact that the glossy white plastic iPhone 4 Dock is so downright diminutive isn’t a complete shock—the company has released iPod nano and shuffle docks that were smaller, but like the iPhone 4 itself, this is the tiniest iPhone dock to date. When it’s placed next to the company’s three-year-old iPod- and iPhone-agnostic Universal…