I realize that we don't have a strong community in social network, I create a page for all Qt Developers around the world in Facebook for all kind of levels, material is also taken from Qt project and individual sources, let's make a like and improve and share this to grow Qt Developers.
"Qt Developers on Facebook":https://www.facebook.com/pages/Qt-Developers/511618278892064
Hi bjanuario, there are also these two fb pages: "QtByDigia":http://www.facebook.com/Qt and "QtProject":http://www.facebook.com/qtbydigia so maybe a fb group would be more useful, but we can discuss here anything related to Qt, but nevertheless your page got the lucky 13'th like from me ;)
Qt devs are more common on Google+. But most of community is centered around here, IRC, mailing lists and QtCentre.
I think we already have too many places to communicate. It takes way to much time to monitor all the current channels (mailing lists, IRC, bugtracker, this forum, qt-center.org, plus things like stackoverflow, etc. where questions pop up, too).
I further doubt that you will get many of the people actually working on Qt itself onto facebook:)