I stumbled across these guys, who resell MEV kits from Europe:
http://exomotive.com/sonic-7/
Seems like they are very similar in concept with what they are doing as compared to where the 818 will wind up. These are exoskeleton cars whereas the 818 will have a full body from the looks of it. And, the big kicker for me is that the 818 will have a true windshield - none of these MEV kits have anything more than a plastic screen, so you would have to wear googles or a helmet to prevent a bug in the face...
Aside from that, the Subaru based kit probably has more HP, and I'm hoping it's more 'complete', with a more well thought out construction manual - I think these MEV kits have a pretty weak manual, if they come with anything. Not fair to speak for MEV without knowing, but I'm assuming Factory Five will have a lot more design time into the car as well - it should be safer and better handling...
Any other thoughts? I'm just trying to envision how the 818 will match up to some of the competition that is out there...