It’s slowly getting there. Got the context menu to show up some
actions, and they worked right out of the box. Yay! Later I’ve
changed the activate signal to fire a asynchronous call to the
activation function. It’s a bit more responsive, but still needs some
work. Here’s a screenshot. It’s even translated to Portuguese!

Next on my list: Columns and better UI for the Dublin Core
properties. Maybe a Sharing menu/window.

You don’t know what Plone Desktop is? Don’t know what you are missing
:) Checkout Enfold’s Website.