After a price reduction and the fifty-percent-off code "ipod50off," the shipping's free and you pay just $6 (plus tax in CA) for this wonderous little convenience, usually priced at $18.
Basically this is a generic rapid iPod charger that fits in your pocket and plugs into the wall. Details from the seller: "IC chip protects against overcharging and short circuit. Designed specifically for iPod with dock connector including iPod 3G, 4G, iPod Mini, iPod Photo, iPod Nano, iPod Video. Universal Voltage: Compatible with both 110/220V."