If you have more than one iPod - or an iPhone and an iPod - the Griffin PowerDock 2 can charge both at the same time.

Accessory and peripheral maker Griffin Technology is now shipping its PowerDock 2, a charging base station for the iPhone and iPod family that offers two charging bays so users can charge multiple devices at the same time. The PowerDock 2 is compatible with iPhones and any iPod that charges via a Dock Connector.