Dear Federico, you have here the contact for the project openZIM.
The main contact is Manuel Schneider (manuel.schneider@wikimedia.ch) and the group of developers can be contacted with the address (dev-l@openzim.org).
Manuel can clarify you the status of the project.
Federico Leva is member and treasurer of the board of Wikimedia Italia. Wikimedia Italia is looking for a new solution for the CD of offline edition of it.wikipedia and would have a look in OpenZIM to investigate if this solution can match the requirements of Italian board.
Wikimedia Italia seems to be interested also to support the project like Wikimedia CH is doing.
I have received from Manuel also the notification that some tests are not in progress due to the overload of work, but I think that Federico could help you to found some testers.
Ilario Valdelli Wikimedia CH