This is what it looks like above but its only visible to users logged into the site. It’s awesomely flexible and super quick – it updates without having to refresh the page. Just like on Facebook for instance. It has some rich text options and you can add easily add images, links and code even.
I love this theme which comes from WordPress and they actually use if for internal collaboration – more here: http://p2theme.com/
More detail on the theme functions here (although I haven’t activated all of the options yet – like ToDo posts which I may do later): https://wordpress.com/themes/p2-breathe/