This car is now one step closer to production! The new name is XL1:
(click on image for link)
There are/were several typos in the post, but they are saying 0.9L100km which is a little more than 260mpg US -- which a sizable increase from the second version, and back up similar to the first version!
Wowza!
Wait -- I almost missed this! It is now a side-by-side two seater! Holy crap! This picture makes it more obvious:
The seats may be staggered?