
Thanks for the tip.
After a lot of looking around, I found this blog post (Sep 2013 - http://www.openxconsultant.com/blog/2013/09/openx-source-continues-as-open-source-project-revive-adserver/?wt=2 ) saying that OpenX has sold OpenX Source to an open source developer who is now working on it as a separate open source project called "Revive". See the Revive project site here:
http://www.revive-adserver.com/
I'm going to give this one a go and see how it works.
- b -