I have created a copy of the cfengine COPBL on GitHub , where I will use it as a playground for changes and additions. This is in no way endorsed by cfengine - it is just my personal copy. But if you use GitHub and want to use it, go ahead, I will try to keep it updated with respect to the original subversion repository , although it will include my changes too.
Visit the COPBL web page for more information. Hopefully at some point the cfengine people themselves will host the COPBL at GitHub, then I should be able to remove my repository and just fork theirs.