As explained in a private mail to Sebastien, I've taken up the http://www.cocoondev.org/handbook site that Steven graciously set up for me. I intend to work on the "mid-level" tutorial that was the initial goal for the Cocoon In Action project. Doing it in Daisy is much easier for me, since it gives me quick access to an editable environment. When it amounts to something useful, I'll happily cooperate in transferring it into the "official docs".
The Daisy plugin for Forrest is working (to a point). Images do not currently work, but someone will get the itch sooner or later.
This means that the pages of this handbook can be included in the official Cocoon documentation by simply adding links in the existing site definition. It will be included with the Cocoon skin and navigation and therefore the integration is seemless.
This plugin is curently in whiteboard and is yet to be rigourously tested, if you want to see how it works and include any sections of this handbook let me know, I'll do the necessary for you.
Ross
