the obvious question, what is the efficiency of this thing in terms of energy in vs energy out as compared to conventional systems (taking into account all the energy needed for getting the gas into the bottles)? Also, in order to crack enough molecules to get the desired flame intensity, how much electricity is needed? Will you require a nuclear power plant???

I'm more interested in their technique for reducing the cost of Pt in the electrolytic cell.

Pretty cool.
I remember reading that there was some concern about transporting hydrogen on a massive scale to power cars (if hydrogen cars take off). This could be an ideal solution there, have the hydrogen stations generate the hydrogen on demand from water, and put a wind turbine/solar panels on top of them to provide the electricity to do so.

That is hardly news. The water welder must be close to a hundred years old invention by now...

Neat Idea - If this could be made to work economically it would be a boon for hobbyists and professionals alike.

any time I ever saw electolysis with water, it quickly built up glunk on the electrodes.
does that mean you need to use distilled water? Tap water has a heap of junk in it that would surely clog up that system

Research "Brown's Gas" its been used for bonding and welding for years.
It's my understanding that the exact ratio of oxygen to Hydrogen will create an implosion, resulting in over a 600 to 1 ratio contraction of the gas into water.

is everybody here telling me that they have never even seen this guys youtube channel:
https://www.youtube.com/watch?v=0QdEYUt4LL8
He has had this flame working for the better part of a year and uses it on a regular basis, check out his videos if you dont believe me.

Isn't this what is generally known as "Brown's gas" and, as Jens Sigurdson says above, has been around for many years? It is even being used in cars as a supplement fuel supply, using an on-board gas generator, to reduce consumption.
See your article: HH2 hydrogen technology purports to turn any gas-guzzler into a hybrid - dated 3 Dec 2009

As many have already mentioned, this ain't nothin' new, *but* with recent research into advantageous catalysts & techniques that make the electrolysis reaction more efficient, isn't it about time we take this concept into a fully self-contained system? Cars running entirely on water are completely possible, basically by taking part of the energy produced at combustion to use for electrolysis and part for propulsion, right? Isn't it a matter of efficiency? There is enough energy in there, right? Or is the energy required for electrolysis roughly equal to that produced by combustion (or fuel cells or whatever)?