Here's another nano review, this time by Stuart from Pocket Lint. Here's a snip from his article:

Who would have thought that the iPod killer would come from the manufacturer of the iPod. The new nano is small, sleek and very sexy, but can it live up to its tag line “Impossibly small”? Pocket-lint took a closer look. Coming in two varieties; a 2Gb and 4Gb model both are available in black or white. However using the mini name just wasn’t going to cut it and this device is amazingly small. Think two iPod shuffle’s but only flatter and weighing a svelte 42 grams and you start to get the picture.



Link: Pocket-Lint