Yes, I also heard about electrovaya's contract with bricklin, after starting this thread.....
The only thing that impressed me about nanosafe's battery was the cycle life, energy density is not bad, but nothing to write home about either. Cost certainly has to come down though, the only reason they are scraping by right now is because the product is heavily subsidized.
I am also not sure about thundersky's batteries. I know early ones were unreliable, but are they still having problems? I wasn't able to find much info from recent conversions, possibly because no one wants to risk it. Did read one the odd case of a satisfied customer, but not much to draw a conclusion. Do you have any recent reports?
Thanks for posting.