A couple years ago, this got written up in forbes, alongside the 1KW power generator that Kamen invented which can be run off of burning cow dung (sterling engine, as I recall it). I think the thought is that the generator and purifier can be run together, or the purifier run off of waste heat from the generator. Honestly, he's partnered up with the guy who started the gremayne bank in Bangladesh, so I'd not brush this off so lightly. It doesn't matter where you are, this device would seem to have some value. However one might want to knock Kamen, he's got a lot of smarts and a very idealistic streak to his personality without being a Henry Ford style dictator. Between his wheelchair, the DARPA arm, the generator and this thing, I'd say he's okay by me.