Here's a bump.

I compiled the latest aufs from their cvs. I changed it to use atomic_cmpxchg instead of cmpxchg. To use cmpxchg means kernel modifications which puts me in same situation as unionfs so I chose to use atomic_cmpxchg. This module will insert on any 2.6.21-omap1 kernel that is flashed on your tablets (48 Mhz, rotation etc).

http://qwerty12.maemobox.org/modules_libs/aufs.ko