Twisted has a somewhat extensively customized BuildBot master configuration which has evolved over the last ten years. It contains many features that people might want to look at.
All bugs Latest bugs reported
Bug #1296501: no config.production for buildbot?
Reported on 2014-03-24
Bug #1269764: install the correct version of sphinx on the documentation builder
Reported on 2014-01-16
Bug #1265400: install cffi >= 0.6 on buildslaves
Reported on 2014-01-02
Bug #1265312: "Resubmit build" button loses test-case-name property
Reported on 2014-01-01
Bug #1246774: Ratcheting hides duplicate errors (sometimes)
Reported on 2013-10-31