Sorry for the lack of news, my mistake…
I'm actually working with a Slackware 15 base to build a variant which use the good old way of Linux/UN*X distros, no PAM/elogind and other controversial parts, but only the old Consolekit2/cgmanager for the moment as I don't have time to trim useless parts, and as in some way I like these components.
Fortunately, my situation has changed recently and I found a job that can fund me while I'm working on superBoxon.
So, don't worry, there will some good news in a very short time.