Another HHO Gas Manufacturer

Came across another of those local news station pieces on a "local inventor" who has created their own HHO Gas or hydrogen on demand system. I'm working on putting together some interviews of these companies in the coming days. 

My take on this is that folks are educating themselves about how to build these things and once they build a prototype or two, the next logical step is to create a company and sell the devices on the Internet. Is there some reason why you shouldn't do the same thing? :-)  I think the real marketing angle here is word of mouth not so much the Internet. That's what I'm hearing from mechanics I've spoken to about this.