A flash-based iPod.
From the Mac News Network:
# iPod shuffle features new iTunes with auto-fill that will automatically select songs for iPod shuffle. Can also be used at flash storage device. 256MB usually cost $149. iPod shuffle in two versions: 512MB ($99) and 1GB ($149). Neon green box. Now shipping. Apple offers four accessories: Dock, Battery extender (20hours of battery life), Car adapter--each $29. Due in next four weeks. [10:56 PT]