I worked with Zachary Ware, who maintains the buildbots for python.org. Zachary upgraded python.org's buildbot from 0.8 to 0.9: https://www.python.org/dev/buildbot/ buildbot 0.9 is the first release of buildbot that can run on Python 3. The python.org buildbot master is running on Python 3.4: http://buildbot.python.org/all/#/about That master is connected to multiple workers/slaves, most of which are 0.8 running on Python 2: http://buildbot.python.org/all/#/workers This upgrade could not have been possible without the porting of Twisted PB to Python 3. This is a highly visible deployment of Twisted running Python 3, and aligns with python.org's direction to move the world to Python 3. :) -- Craig