Sorry to inundate you with even more Apple-related products, but might as well go with it while they're on a roll. The Microblast Speaker Dock, designed specifically for the iPod Nano, is damn good-looking and well-designed. It uses AA batteries and an AC Adapter lets you play music while charging. And since we all seem to be so worried about protecting our precious iPods, the Microblast's clear protective cover makes sure you won't get even a tiny scratch. Comes with white or black interchangeable frames and a travel pouch, all for $120.
The Microblast, A nano Speaker Dock [OhGizmo!]