With many thanks to the comments here and via email from TNers (original thread), the Mapping project manuscript has moved from white paper to in-press manuscript. Yes, it took a long time.
I hope this is something researchers and thinkers find useful. From talks with funders and fellow researchers, I know that the issues of real/virtual comparisons and inferences are of keen interest, and it's my hope that this paper helps people think through the attendant issues. As I was contemplating the many uses I see in this space--disaster preparedness, military training--it occurred to me once again that the price of doing this wrong and drawing bad inferences is very high indeed.