In Pictures: The hidden iPhone - New photos from e...
Nishibori's design -- apparently an exercise to answer the question "What would Sony do?" -- clearly shows the centered home button at the bottom of the model. In the other mockup above it, it's unclear what the large "button" at top right is: a home button placement or possibly a front-facing camera?
In Pictures: The hidden iPhone - New photos from early 2006 show Apple's design tinkering