Griffin's first two PowerDocks were blockbuster charging stations: PowerDock 2 and PowerDock 4 offered multi-iPod/iPhone users the ability to simultaneously charge two or four devices at once, respectively, back before the idea of keeping a couple of Dock Connector charging wells next to one other became common. So the company's new PowerDock Dual ($60) is trying something a little different: on the left is a well ready to hold an iPad, while…
