A prominent academic researcher tipped me off to this article on ultracaps in the April 09 American Ceramic Society Bulletin. It includes an article on ultracaps for vehicles with a section on EEStor and Zenn Motor Company.
<--There is a photo with a caption that reads, A Zenn Motor assembly line worker installs a capacitor bank.
Check with Zenn for more info. :-)
UPDATE: Most believe the photo is simply misattributed to Zenn. I'm unavailable to doublecheck it myself with Zenn/ACS.
UPDATE #2: The publication confirmed the photo is simply mistagged. It is not a vehicle made by Zenn.