Sounds like Mitchel got distracted. I get it, internal company wiki entropy is a hard problem.
I think it's his job now to get distracted. :) Though I see no reason from this post to think Hermes is one of Mitchell's projects.
After 2 epochs make the legacy^2 wiki available only upon request that is active only for a week at a time.
Also, it sounds these ideas have been learned from many painful lessons?
IMO, document management's root problem can be well understood with behavioral economics: a nice library is a public good. Maintaining it is costly. More people need this to sink in.
So, with this realization, we should design accordingly, with _all_ necessary organizational and behavioral levers in place.
This is what social software means to me. ^