Jens Ohlig is a software developer and activist with the Chaos Communications Club in Germany. He has been active in the German hacker spaces C4 (Cologne), and Netzladen (Bonn). He helped to organize the Hacker Spaces Tour at last summer's Hackers on a Plane tour. His �Hacker Space Design Patterns� talk inspired the creation of the U.S. hacker spaces NYCResistor and HacDC.