Probably not. I have not seen any reference to kernel 3.8 and AUFS. But then again it is a beta so it might arrive when the actual release is planned.
But it looks like AUFS is going to get deleted anyways. If it has not been deleted already.
Some links I found when searching ...
From this link:
In light of the concerns about overlayfs being sufficiently cooked in time for Precise, Andy Whitcroft and I have decided to re-enable aufs
We will continue to advocate for dropping
aufs in favor of a sufficient
upstream solution at each development cycle. This means that aufs will
disappear in future backported LTS kernels.
In other words, don't bet your business on aufs.
Conclusion: it did not work good enough in 12.04. It did work in 12.10 but it is doubtful it works in any future release.
From the links in this question:
How do I use OverlayFS?
Early in the Precise Pangolin 12.04 development cycle, we disabled
support for AUFS in the kernel. This decision was made at UDS. The
reasoning behind this decision included:
* AUFS is not upstream. Despite previous efforts from it's
maintainer, it does not appear it will ever land upstream.
* AUFS is a maintenance burden for the Ubuntu Kernel Team due to
the fact that it is not upstream.
* Support for OverlayFS has been available since Oneiric. We have
been encouraging migration to OverlayFS. The installer has
already transitioned to using OverlayFS (which was done in
Overlayfs is a successor of a series of union filesystem implementations, such as unionfs, aufs, etc. It creates a single unified view of two directories. One is the "lower" filesystem -- in our case, this a read-only mount of our original, pristine Ubuntu AMI. The second is the "upper" filesystem -- in our case, this is a read-write mount of an encrypted block device. We’re hopeful that it might one day make it upstream into Linux, though progress on that seems to have stalled. Thankfully, Ubuntu’s kernels are carrying it for now.
You should be focusing on
overlayfs. See the accepted answer here: How do I use OverlayFS? on some documentation.