Apple is rarely content merely to make a small handful of hardware announcements. That’s why, in addition to unveiling two new models of iPhone and two new iPhone cases, the company also unveiled a pair of new docks for the new iPhone models.
The docks are only very slightly different, with the minor differences due to the minimally different shapes along the bottom of the new iPhone 5c and iPhone 5s. The iPhone 5s Dock will work with the original iPhone 5 as well. But neither dock will work if your iPhone is clad in a case—even Apple's own cases.
The docks include a 3.5mm (1/4 inch) line out output. Apple’s website says that the docks will be available in stores beginning September 20.
Updated 9/11/13 to confirm that the iPhone 5s Dock works with the original iPhone as well.