Ny Teknik assisted recently in a test where the E-Cat device invented by Dr. Andrea Rossi was run in self-sustained mode.
It ran for just over half an hour without external energy input.
You can read the full NY Teknik Article here: http://www.nyteknik.se/nyheter/energi_miljo/energi/article3264362.ece

September 20th, 2011 8:15 am
According to Andrea Rossi’s patient WO2009/125444 A1 one gram of nickel produce the same energy like 517 tons of oil. That means that a gram of nickel yields over 5 billion calories, and is over 30,000 times as energy dense as oil or coal.