Hi Piotr!
I added you links to http://meta.wikimedia.org/wiki/Talk:Research/Social_Research_Collaborations
You probably know http://bibliography.wikimedia.de. Do the categories (http://meta.wikimedia.org/wiki/Wiki_Research_Bibliography#Categories) fit your needs? I could not participate in Wikimania :-( Which of the many talks and papers at the event do you regard as scientific so I can include them in the bibliography?
Greetings, Jakob
P.S: At August 23th I'll give a workshop on Wikipedia Research in Odense, Denmark. There is still possibility to participate: http://meta.wikimedia.org/wiki/Workshop_on_Wikipedia_Research,_WikiSym_2006 (page not fully up to date but valid)