Some time ago I asked for help with my research on several 3D forums.
I got over 200 readings, and even a couple of replies!
This is an updated resume of the reactions.
On vfxtalk jah commented about a very interesting and apparently similar project: Jahnet, related to the multi-platform free open-source video editing software jahshaka
More on that when I check it through.
I also received a private reply from someone who is writing a book on the subject, this can be quite interesting as well.
On the sidefx forum, Edward pointed out a new side of the issue:
"You should think about interchange as part of the problem. Take a look at Collada.
(This company offers free plugins for 3D programs)
The idea of "digital assets" (eg. HDAs (Houdini Digital Assets) in Houdini) I think forms a good basis for it as well. See exchange for example.