I was lucky enough to step foot in my Comp USA the moment the PDA guy was unpacking the demo unit. I was amazed by how much color adds to the pod. I did notice the thickness, compared to my 10gig 3g, was massive.
As cool as it is, I run around with my 'pod a lot, and my 3g is in great shape. It still holds all my music, and plays it back... which is why I bought it. I'll be holding out on the iPod photo until it can play quicktime videos (this would probably allow the iPod to have a visualizer option), and it's a bit thinner.