This is probably of most interest to PC users with 3G iPods (but note they can't charge via USB):
The PocketDocks are little dongles that attach to the bottom of your iPod replacing the dock with regular USB and Firewire cables. They've had PocketDocks that support both USB and Firewire connections, and one that supports Firewire and a Line out (this is the model I own, along with the original Firewire only model), but now they have a brand new model: The PocketDock Line Out USB, which offers both a Line Out and a USB port. $29.95 USD with cables included.The web site describes even more bennies:
The PocketDock Line Out Pack includes two 6 ft. ultralight and ultra-compact white audio cables: One with 3.5 mm (1/8") stereo plugs on both ends, one with stereo RCA and 3.5 mm plugs. They are slim enough to fit into the palm of your hand and come with detachable velcro straps for convenient storage and cable management. Their beautiful design is a perfect match for both iPod and iPod mini — just like the PocketDock itself.This is a far better deal than the bulky and ridiculous USB cables Apple shipped for the 3G iPods. NOTE, however, that 3G iPods can't charge via USB. SendStation is good enough to note this, albeit in very small print. Later iPods will charge with this cable.
What good is a PocketDock, if you don’t have it at hand when you actually need it? Well, if there’s one thing you always carry with you, it’s probably your keys. That’s why your PocketDock now comes with a free detachable keyring dock.