Bah, this stuff is not dangerous. Think about it, if I drink a liter of the stuff, all it has to do is dissolve 1 mg of ANYTHING in my body and it's already less pure than the stuff coming out of a standard R/O filter. Going from <1 ppm of contaminants to essentially 0 ppm doesn't turn it into something caustic. As far as the taste, all freshly distilled water tastes that way. The flavor we associate with water is mostly the salts and such dissolved in it.
Sorry for the crabbiness, sensational tech stories are something of a pet peeve of mine. The technology itself is interesting though, thanks for the link.