Hi all
I like the new design so far, finally dumps that all shiny fingeprint magnet back, glass appears to have been dumped in favour of aluminium near the top and bottom (bars) and a different surface in the middle, plus the biggest change is the back which is now one piece with the frame. The antenna housing is now colour coded to the frame - no more silver / black, and this could also mean its anodised for better functionality and less attenuation when in contact with skin oil.
From the picture / video I have seen so far, I believe the back of the case maybe a touch panel or improved grip or even NFC built-in, the internal grooves inside the frame on the back are either wiring panels or some type of inductive charging system or even possible micro heat fins as the left side is where the battery will sit (long rectangular area). The secondary pick up microphone which was on top has been changed to the rear between the camera and LED flash.
Others have questioned why the size of the lens and LED have been separated. It's been discovered the F rating of the rear camera module (Sony) has been altered which would alter the lens shroud, and having the LED further separated stops light bleeding from the flash. Meanwhile the secondary pickup microphone is between these two, possible as a microphone for video recording as well - perfect positioning.
The longer (elongated) design means you have a greater viewing area, but keeping its width means you still have full access without having to use two hands. Making it wider also makes it more difficult to use single-handedly. The bottom has some drastic changes, new Mini USB connection port which matches the UK 30 pin adapter here:
http://store.apple.com/uk/product/MD099 and this mean the speaker / microphone area (if not dual speakers) is larger and will produce better audio.
I noticed on the right side of the frame there are two to three flat circular screw plates / thread plates which indicates a PCB or other component will be screwed to the chassis. The relocation of the headphone jack to the bottom matches up wtih the iPod touch etc and allows more valuable space to be freed at the top.