Looking for a speaker who can give the big picture of building a community CMS

This is a bit off topic. I'm organising a conference this year and I think a presentation on building a CMS (or the challenges associated with building and testing such a platform) would be really good.
This is my general invitation to members of the Plone community.

More info is here: https://www.webcraft.com.jm (static site, not Plone........ yet).

What do you mean by a community CMS? Do you mean a CMS for a community, ie. a town or neighbourhood?

In this context I mean Plone. The community process of improving the platform, the challenges etc.....
Other talks are welcome, just thought that might be interesting to address.