Bumping this thread, which has been viewed 300.000 times.
The Ca-MEiV Concept:
http://www.caranddriver.com/news/mitsubishi-ca-miev-concept-photos-and-info-news
What I find most interesting is the recessing channel or duct bisecting the backlights. I think it would act as a vortex generator pulling air off the upper sides and using it to cut off the air flowing over the top with a scissor-like action. Effectively, cutting off the wake at mid-taillight.