While the current experimental implementation of the PB3D specification is not (yet) complete, would it be correct to say that the specification itself is considered complete?
What is the likelihood of the experimental PB3D implementation being completed (ie. to spec) in the next few months - ie. before the experiment is potentially closed down?
The specification is close to complete - I am sure there are things in it that need clarifying, and there are probably errors but the basics of the spec. are all in place.
It's difficult to say whether there will be more development of PB3D - as you noted in another thread, there haven't been that many responses to our announcement about the future of PB3D.