Just a quick note: I'm very proud of the very successful openSUSE conference and wanted to spread that word ;-)
Seriously, the "collaboration across borders" theme has worked out incredibly well. We even have a Red Hat developer with his own Build Service Project now. And I heard whispers about Mageia pondering the use of OBS as well. Awesome!
I know, I know, we didn't fork any big projects - well, actually, we had the first LibreOffice conference tracks there - it's becoming a real open source project, finally. Getting rid of pesky code attribution stuff has taken down a huge barrier. (meanwhile OpenOffice keeps crashing on my laptop. Which is OK, I used KPresenter for my presentation - too bad Beta 2 introduced the audience to ODF tags in the slides hehe)