Hi,
We just posted new research on Zenn Motor at the Dollarton Cantech Letter. This is the second in our "Head to Head" series in which we compare the books of a small tech stock with that of a larger one in a similar space.
http://www.cantechletter.com/2010/05/head-to-head-westport-innovations-vs-zenn-motor-tsxvznn/