Following up on my original OpenSuse 12.3 installation on this fantastic laptop, I decided to perform a new install of the latest OpenSuse (13.1). As usual I kept my home partition and reformatted my /.
Everything works out of the box. Even (and finally) the multitouchpad. Full resolution even when my external screen is added. WiFi worked immediately. Also the screen brightness adjustment keys work (perhaps due to my fix that was still in place, see here).
Only pitfal so far: my webcam is not responding and cheese stays black. Will find a fix for that : ) I could use it in a google hangout yesterday though, don't know where this sudden lag comes from.
Follow fixes for the webcam here.