I tried this:
In January one hundred educators from around the globe were invited to meet in Austin, Texas to mark the tenth anniversary of the New Media Consortium Horizon Project and reflect on no less than the future of education. A Communique from the event listed 10 Major Trends that are having an impact on education globally.
After two weeks just one respondent (thanks Andrew!)
Leigh Blackall then wrote:
Michael, my hope was that you would act as the mediator between the contribution made in this forum, and the wiki that - to be honest, I am reluctant to leave a digital footprint on, and given I am on mobile so much, can't really manage much more than email. So, please feel free to document what ever I contribute here in this email space, into the wiki. This is what I do on my own wiki projects, when I gain feedback on research and writing, because I know it is very unlikely that I will draw others into the wiki.
....after several tries at this kind of thing over the years I guess I have to reluctantly accept that, as you seem to have already discovered, people by and large do not voluntarily contribute to public wikis.