Just in case you did not see it yet, dc.watch.impress.co.jp published an article with some photos of the M mount module:http://translate.google.com/translate?j ... 25847.html
It seems that the displayed module is in a very early stage of development? If I got the google translation right, there is no sensor inside this displayed module (it's rather a development mockup) and it was forbidden to touch.
I'm very curious about the module protrusion. It looks as if some more electronics have been packed inside the module? Or, and that's the most probable reason, the necessary electronic had to be moved to make some room for mount and/or to leave more space between the lens and sensor. This clearly shows that Ricoh originally did not even consider the lens mount module and that the existing modules were designed for minimal required space. I somehow hope that this is not the final design and that this protrusion will be minimized in the final module?