I've thought about the HHO generators and glass before and I'm not sure if it'll ever catch on but it sure is interesting. For years, there have been a lot of people making a lot of claims about splitting the water molecule into it's component elements for fuel.
It seems magical but I think thats because they use the "water as a fuel" line and thats what people are focussed on. Conservation of energy is a snagging point though....
There are a few ways to dissociate H2O into it's component gasses but that requires energy. Due to the inefficiency of the processes used to get and store the gasses, I don't think it currently makes sense to add a step into the energy chain. They're getting more efficient but no one is getting 2 joules of energy out from putting 1 joule of energy into dissociating the water into the gasses. No one is getting 1.1 joule of energy out from 1 in either.
I've messed with this on and off for a few years and created hydrogen a couple ways, chemical reaction and electrolysis. Electrolysis seems to be the way most of the more serious people are headed and that could be due to the fact that it uses DC, just like a cars charging and electrical system. It's not something from nothing, it's just capturing and using a small percentage of the wasted energy. Same thing as some of the modern hybrids.
It would be cool to one day just plug in the WaterTorch3000 and work glass all day off a gallon of water but I'm not sure what the electric bill would look like.
Also, physics professors seem to be fond of lighting balloons of hydrogen and yeah, it's pretty explosive stuff...
http://www.youtube.com/watch?v=KOgKxF-p-pc
http://www.youtube.com/watch?v=MMB2V...eature=related