Jannis (also known by his nick 'jezdez') is a core developer of Django and Pinax and chaired the recent DjangoCon.eu conference in Berlin.
Jannis will join our existing team of Brian Rosner, Alex Gaynor and Yulka Plekhanova, working on both client projects and Eldarion websites.
Jannis is to open-source software what Paul Erdős is to mathematical papers (see Erdős number for an explanation of the latter). Your "Leidel Number" is how many degrees of separation you are from Jannis in contributions to open-source projects. We're still on the lookout for anyone with a finite Erdős-Bacon-Leidel number.