Autocar recently posted the latest pictures of an i3 during what is described as hot weather testing somewhere in Southern Europe. It would seem from the pictures the car had some kind of mechanical failure because they appear to be trying to recharge or 'jump' the 12 volt battery.
The car is still very well disguised and even the interior shots show they have everything covered to prevent anyone form getting real images of what they are working on, but a couple things do stand out. The steering column is long and really comes a long way from the dash, just like it does in the concept i3. The car also has basically the same display panels as the concept i3, with a small rectangular display on top of the steering column and a larger display in the center stack, however both had a fabric cover over them. After seeing changes in the body style in all the test cars for over a year, now every new set of spy photographs show the same thing, so I think it's safe to say they have the final production form decided. With the car 12 months away from it's rumored launch, I suspect they would have to have that set in stone by now so they can begin to get the production molds/stamps ready.