Carbon team is workin' hard on an AOSP based, so we don't know when we'll be out.
Derek, other team's members and I... we proposed a CM based, instead...
So this is my CM-Carbon based on which I am working. I called STELIX to distinguish it from Carbon.
Actually has CM-AOKP-Slim-AICP features, some little adjustment to do (a lot of "ToDo") and two ways of Fibers (another discussion on it, 'cause AOSP proj. obviously hasn't).
Last working build is:
https://www.androidfilehost.com/?fid=95916177934538150
and from time to time take a look to its folder:
https://www.androidfilehost.com/?w=files&flid=25971
Please be patient, don't ask for eta (I haven't much time, neither to open and maintain a thread... so).
Otherwise take a look to sources:
https://github.com/STELIX-Lollipop
Thanks alls.