Just sharing a quick WIP image of the XF2 version
The editor is missing still, but we're making progress!
The XF2 version will be easier to style and more adaptable to custom skins, as I've managed to severely slim down the amount of custom CSS needed, thanks to the vastly improved default CSS.
Also, in case there's any doubt: The Shoutbox will be a widget

You will configure the particular shoutbox instance to deploy in the widget configuration interface in XF2, so you no longer have to modify templates in order to deploy the Shoutbox in custom locations.
Lastly, I want to create an ultra-slim widget that can be used either in the sidebar or just as a slim version in general, as I know that's something you guys and gals want

This version of the widget would remove the tabs as well as the Active Users block. This may not be included in the first release version, as I need the basic functionality working first
Fillip