First of all, mad props go to Jérôme Oufella who started the whole thing and dropped a mail.
In current git master you will find a really rudimentary shell extension. This is how it looks:
There is the current activity and duration and you can stop it and call out the standalone.
To install it simply follow the usual installation steps and then restart the shell by pressing Alt+F2 and then “r” for the command.
It’s work in progress of course.
Oh, and if something breaks you can always remove the extension from /usr/local/gnome-shell/extensions/
After installing the new version I had to run `glib-compile-schemas /usr/share/glib-2.0/schemas/` before restarting gnome, otherwise it crashed with the following error:
GLib-GIO-ERROR **: Settings schema ‘org.gnome.hamster’ is not installed
hmm, the waf is actually doing that!
Ah, well then it’s an Archlinux related issue, I installed it from the AUR and I guess that’s where things got messed up.