It's strange that the Nano is so different from the previous version. If you think about it, the new Nano is awesome, but compared to the old one, it lacks the camera and video playback. Maybe the small square screen wouldn't allow for acceptable video anyway, and there would be no point in having a camera in there (though it would be awesome for taking spy shots).
Since the Nano is now a totally different device, they could've just kept the old Nano as well. Well, maybe they are going to keep it silently.
It's interesting from Apple to acknowledge that the lack of buttons on the Shuffle was bad, and they ended up making it bigger again. I liked the buttons and I think it's a good idea to put them back.
The Touch is amazing, thinner and with cameras, with the Retina display, Gyro... Up to par with the iPhone 4. The rear camera not taking decent stills is quite lame though, even my Nokia takes 2 MP images (but even those are quite bad quality). But it's better than nothing! And FaceTime is great though I still think it will be extremely limited since it only works on WiFi (well for the iPod Touch there is no other way anyway).
FaceTime to Skype would rock though.