On my request, my friends at WPMUdev kindly implemented a Quick Status WordPress plugin for me.
It works similar to the status update dialog in Facebook/Google+ where you enter a link, the system looks up the page and tries to pick out a sane title, abstract and thumbnail image or video – which you can then edit (something FB/G+ don’t allow you to do for all fields).
See the demo video:
None of the implementations are perfect, but quick-status been pretty handy so far. I’ve just asked for one more feature, a “Save as Draft” button since some links are not time critical and should be scheduled for later posting.