(did not read the linked article)
I'm for anything that will stop polluting our planet, even if will cost me double. Although in this case, if seawater fuel will be $3 to $6 per gallon that's pretty good considering I'm paying $1.47 per liter as of this morning, so that would be even less expensive or about the same for me where I live. Oil pollutes, and you would have to do a lot of talking to convince me that any nuclear power is safe.
I really don't know what would be involved to make corn-based fuel, but I have a friend who goes around to all of the fast-food joints in his town to pick up their old fry oil and uses only that to drive his truck around. Runs great. I for one would be willing to pay for something corn-based for driving my vehicle around since corn is really not much good for eating anymore in my opinion considering the majority of it GMOed. I try to avoid as much GMOed food as I can.
I really hope that a seawater fuel is something that will/could be a realistic possibility.