Sure they do, an MCMHU(heating unit they call it, not a water heater) Question is, is it in the form of a water heater that can heat water to take a shower, wash hands, do laundry, etc.?
I personally don't think so. I think they have a bench top model that heats incoming water. It is still unknown to what temperature, what flow, and what power consumption. The fact that it has taken so long since they PRed they have a completed unit tells me its not what they claim it is.