Getting Things GNOME! has been released on November 6th but I was able to test it only tonight ;-)
So far, I'm very pleased by this release and to be honest this seems to be the first time synchronization with Remember the Milk is working (I used it on my n900 and I plan to use it know on my android.... but I need to wait 22h before next sync)
I've also installed the integration with gnome-shell very quickly and it seems awesome !
The development team as done a very nice job...
If you plan to test it, I've packaged this release for Fedora 17.