Nick at @thelinuxEXP did a nice review video of #GettingThingsGNOME 0.4!
We'd like to mention that someone started developing CalDAV synchronization for GTG. We invite y'all to test & review that: https://github.com/getting-things-gnome/gtg/issues/407
You can watch Nick's review here: https://youtube.com/watch?v=swioRb6MK8c