The blog about 2 D700 mounted together resulted in finding this homemade 3D camera in below link:
The reversed joint D700's are certainly a lot easier to figure out, I wonder how he controls focus on the two D700, picture found here and in blog area
http://www.flickr.com/photos/beinder/4392274063/
Anyone willing to borrow your D300 so I can make my own 3D camera
Pete