Many thanks for the keen interest by many!
As of January 2013, this concept has moved a few steps closer to reality, and is maturing rapidly offline for a bit. The paper was nice, but version control became impractical because some of the versions were more like complete sub-projects in their own right. So, together with a few collaborators, I'm pulling the pieces apart and they'll surface again in a new form in due course.
Do please contact me if you were attracted by previous postings or are a senior epidimologist, medical ethicist, lawyer or informatician.