Looks like Co-Founder (and former colleague) Ralf Klinkenberg is in the NY Times today.
"There is a good start-up culture," Ralf Klinkenberg, of the company's co-founders, said of Dortmund. via NY Times
He's right, the whole Ruhr area of Germany - a once heavily industrialized area - has transformed itself into a modern ecomony.
This transformation was NOT at the expense of blue collar workers, they actually had new jobs after the old ones closed down.