Holger is a co-founder of the PyPy project, both a new Python
implemenation and a framework for implementing dynamic
languages.  Holger also authors a well known python testing
framework and is interested in new paradigms for deploying
networked programs ala Charles Stross' Zone VM.  He founded 
merlinux in 2004, which organises mostly european specialists 
to earn money with open-source and Python based collaborations.