I set up a repository based on a modified version of ArchAudio, with some of my stuff and lots of PKGBUILDs from AUR's contributors. Hope this helps to update and maintain ArchAudio alive and updated. Just source for now, no binaries. It is a hg repo, so it can also be hosted inBitBucket and Google Code, and can be easily forked, hacked and pushed back. The contribution work can be much easier this way, I think. The initial idea is not _necessarily_ to replace ArchAudio repo binaries, but set up a pool for development of the most updated and new in terms of professional audio packages for ArchLinux.
Happy New Year! Bernardo