Now you see me; now you don't! The iSight camera has been removed and the cables and brackets surrounding it have been slightly redesigned.
In our opinion this is a welcome change, as we have finally been heard. iPods and iPads are not cameras. This is not a joke, and Apple has seen the light.
Major component overhaul seems like a good time to make small changes such as ribbon cable routing. We're interested to see if new 32 and 64 GB models use the same new volume and power button cable.