There is plenty of literature talking about the process of
developing Open Source and its economical significance. And there are also piles of texts about tools that are used in or for developing Open Source... but,
what do we know by all that about the actual people behind the phenomenon? About where they come from, what they are devoted to, what they know...?
Truly, there is lots of speculation, but in reality we know almost
nothing for sure. That's why a research group at the Technical University of Berlin has started Widi (Who Is Doing It?), a questionary for which they kindly ask Open Source developers to take five minutes of their precious time to tell something about their social, cultural and professional enviroment.
The required data is non-personal and nothing has to be filled out if one doesn't want to. The interesting up-to-date statistics can also be found there.