I remember reading about this a few years back, i think it was in "Water for Fuel" (i think that was the title, i'll have to dig it up, i have it somewhere).
I believe GE had a patent on a system where steam was run through a pipe that had little anodes and cathodes along the walls. The book said it was highly efficient, but didn't go into details.
Has anyone heard of this? Has anyone heard of a DIYer trying something like this?
I'll have to dig threw my parents basement and add more details (though i don't think it had much more info)