We're a founding member of X.org, a status that has remained in good standing. It should be clear to anyone working in this space that X is way overdue for an audio standard of some kind, but no entity has stepped up to the plate, as it were, to donate the resources to start the process. In the fall, we decided to allocate some of my time towards investigating possible architectures of an X Audio System. Based on the stuff on these lists, historical research of prior attempts, talking with acoustics experts, etc. By no means have I answered all the questions, but I am working on a paper to clarify my views.
Details are forthcoming.
The goal is to create an industry standard. In the near future, I will set up a mailing list to act as a discussion space for this stuff. I invite you to participate. If you're interested, drop me an e-mail. And, please, if you think I've left out some large section of the population, let me know.