I have begun building a megazinemz3 maker to streamline things for myself but thought it would be good for peopel to harness the full potential of MegaZine.
I'm building a server-based form that gives dropdowns and sliders to set all available parameters so each available option can be decided on in one spot.
Having this translated into a GUI software solution, AIR might be a consideration too, to do just the same thing.
This will allow you to import all your assets, set all the parameters for books, pages, chapters, attributes, plugins and see a live preview. When clicking "publish" is spits out hte entire directory structure, xml, navigation elements ready to just upload as is.