Well i have owned a few iPods..... 20gb 3g, 6gb Mini, and now a 4gb Nano
the Nano is indeed tiny
However, the new 30gb video iPod was much slimmer than any other regular sized iPod i have ever seen. I played with it today and was indeed very impressed, it had to be less than 1/2 the depth of the 60gb iPod Photo next to it. Felt very nice in my hands, and the screen was great.
For me, i wanted Tiny, so i went nano.