very interesting, and already herehttp://www.cnn.com/2008/TECH/science/08/11/invisibility.cloak.ap/index.html
This is a hoax.
Of course he's sure. Can't you tell by the stunning argument he posted to support his position??
Metamaterials are mixtures of metal and circuit board materials such as ceramic, Teflon or fibre composite.
My brother is working on this technology. He tried to show me his work, but with no success.