Low energy nuclear reactions have been around for a while, and the gist of it is that no one really knows what it's about. BlackLightPower seems to also be pursuing the same kind of reaction, and elsewhere on the web people are speculating that Rossi and Focardi are using the same phenomena as BLP.
The Rossi/Focardi gizmo was demo'd as a black box, barely. They refuse to show their reactor's insides in the hope of securing a patent. Reportedly they're aiming at commercial demonstration in a couple of years.