Below is a quick video demo of Editoria. The University of California Press today started a community forum to discuss the project. You can find it here (open to anyone):
https://groups.google.com/a/ucpress.edu/forum/#!forum/editoria-development
Editoria is open source (MIT license) and you can find it here.
The demo video doesn’t cover everything but I hope you find it interesting and useful.
Video made with Recordmydesktop on Ubuntu.