I'm guessing you're referring to Gunnar von Boehn. He was pretty enthusiastic about the Natami and being part of it, but I don't know if he's to blame for anything. He has a personal homepage showing some of his projects, and he seems well-merited to be honest. IIRC, Thomas Hirsch commented here on EAB on the Natami hype and rumors, and the promises made by other developers, long before the current hiatus, and I think he felt he had defused and dealt with things appropriately.
What I'm really curious to know is if Thomas has dropped the project entirely, or if he's still working on it on his own.