Q: Can you use the AC adapter from another IPod (3rd Gen w/ Dock) to charge an iPod shuffle?
A: No. The iPod shuffle has a USB connector, and is designed to be charged directly from a computer with a powered USB port.
Apple also sells an USB AC adapter, in case you don’t have a powered USB port, or if you want to take your iPod shuffle on the road without a laptop to charge it. But other iPod AC adapters won’t work with the shuffle – they have FireWire ports.