None of the press images I’ve seen so far included a picture of the back of the Nikon 1. B&H has one on their V1 product listing:
The Nikon 1 V1 model has a metal (magnesium alloy?) body:
The most detailed Nikon 1 announcement coverage so far is from DCWatch. Here are few pictures of some possible future accessories for the Nikon 1 system (see also this list of future lenses):
Nikon 1 samples on flickr:
Two more Nikon 1 promotional videos:
