On the exterior, the Cube2 is much more refined than its predecessor. Corners are soft rather than sharp, and the lanyard loop doesn't protrude out the top. The buttons are made of tactile rubber, and of course, the new version features a 65,000-color OLED screen.
The blue 2GB Cube2 next to the 8GB iPod Nano. The Cube2 is more than four times as thick as the Nano. It would be nice to get a 4GB (or higher) option. Note that photos and videos get chopped into a square aspect ratio.