Due to some internal re-structuring the apiman project is becoming a standalone project.  I am in the process of rolling it out - you can watch that progress here:

http://www.apiman.io/

We're pushing towards a first Beta release soon (within the next week or so) which will be easy to install and run on WildFly 8.1.

Thanks for the question - I should have put a redirect on the Overlord project page instead of just removing it!