This is really cool and I'm really a big supporter for this type of editors!

Some suggestions:

* There should be an option “demo page“,

* Paragraphs should be drag-n-droppable,

* Arrow keys should take me to the previous/next paragraph,

* There should be “a plus icon“ above and below each paragraph,

* Inline editor should contain buttons for “bold“, “italic“ etc..,

* Pressing “the bold button“ when there's a highlighted word should wrap it in two stars etc.;

Is the thing open-sourced? I would like to help improve it and use it in my blog for writing things.