One thing that needs to be discussed is how to actually reveal the blackbird console. There does not seem to be a method to make the console visible, only to toggle its visibility. Pressing <F2> toggles the visibility. Either we can leave this behavior as is and document the need to press <F2>, or we can put a small debug icon in a div in the corner of the page which will also toggle the visibility, giving some visible cue to the developer.
Once this is decided I can also put together the documentation.