For this reason I think that Wikimania should be splitted in three events happening in three different periods and in three different continents.
Agree. Well, maybe not three but two, but I agree with general idea. When I went to Boston Wikimania, I felt very very weird as it so much about stuff outside Wikipedia and other Wikimedia projects. All those academic discussions how to change the world really intimidated me. What I expected was global Wikipedia meet-up to discuss how to change Wikipedia (and not the world).
Renata