Hi, here's something i've been working on for a while before it was released - works somewhat fine except some issues with file dialog integration between qt5 & gtk (https://issues.qgis.org/issues/17825) and some exit crashes (https://issues.qgis.org/issues/18070).
On the ports side this switches from py2/qt4 to py3/qt5. The full user-level changelog is at http://changelog.qgis.org/en/qgis/version/3.0.0/ Diff is 300kb so not attaching it, grab it from http://rhaalovely.net/~landry/stuff/qgis-3.0.0.diff I'm planning to commit this soon after unlock. Landry
