I don't know what is "unique" about His electrolisis process, similar units have been used by jewlers for years, and show up on ebay from time to time. Hydrogen burns a lot cooler than propane, way cooler than acetylene. See my post 11/2/07 above.
With regard to running His car on hydrogen liberated from 4 oz of water for 100 miles, how much electricity did He use to "make" that hydrogen??? They would lead You to believe that it was generated within the car [unlikely], if so what is the electricity source?