I'm trying to start working on CM for MTK6589 device. (Star S7589)
Kernel sources (for normal Android) can be found (has been released by Acer few weeks ago), but the biggest problem is the "device" folder.
I've written e-mails to few producers (ZOPO, Cubot, THL), and even that I've gotten replies from ZOPO and THL, they don't want to share anything, nor the kernel, nor any other sources.
If you'll get to something, please post it here, or pm me, and if I'd make any step I'll also keep you informed.