The problem is kmod:
These *work* with kmod installed.
In the mean time, all those with v5 devices, I have bundled them from a v6 (oxnas) and placed them http://ppl.ug/E0HZaDPs5i8/dl/data
Extracting these files (INTO /lib/modules/3.1.10-1-ARCH/ !!) will grant you module dependencies for the kirkwood kernel. This will last until depmod -a is run and kmod's depmod output breaks it all again.
This is for working WITH kmod
As always, no warranty implied. Make backups.