CNET Asia has taken a look at the 4GB black version of the iPod nano. Here's a snip from their test report:

According to Steve Jobs, the iPod nano is the "biggest revolution since the original iPod." It's certainly a technical and design wonder at 89 x 40 x 7mm and 42g--repeat: 7mm thick and 42g. It's smaller than it looks in photos. The flash-based nano comes in classic white or black and in two capacities: 2GB and 4GB (the first 4GB flash player we know of!).



Link: CNET