If you have an iPod charging stand, you can use that as a dock. The charging stand has a mini plug connector that can accept a mini plug pin from a cable that has either another mini at its other end or that splits into two RCA pins.

That way, the iPod is charging while you are listening just as it would in any other iPod specific docking station.

Seriously, if sound quality matters at all to you, look around before you buy a product that has an inflated cost and lesser sound quality simply because it can recharge your iPod.