I would like to see a much more concrete document that addresses actual application needs. We have some developers whose applications have needed this sort of application. Those requirements are all we need to address.
OpenACS has proven that it can be adpated. I really don't want to hold up development for years (again) waiting for the "perfect" design. We can get a huge amount of benefit by working on the most necessary features and adding on when we see a need.
So basically I think a must shorter list of very explicit requirements is all we need to work on this.