ian's committing debian-installer support soon for a number of devices. the cubietruck is one of them. sata already in, sdcard next.
The vanilla kernel already supports sata, usb, ethernet, and sdcard, and in my experience these work very well (actually, I haven't tried the ethernet with the vanilla kernel, the problems I had with Gbit ethernet were with the 3.4 kernel).
There's further code available (in the process of being merged) for NAND, IR, and a few more things.
OTOH if you need something like audio/video/OTG, you need to use the sunxi-3.4 kernel which uses a fairly different codebase (uses Allwinner's own replacement for device-tree, for example).
Stefan