I just installed the demo version of Kontakt 3 on my Linux machine and was pleasantly surprised that it works! After not being able to use the last couple of releases of K2 (only 2.1.1 would work), this is great news for me.
There are a handful of demo instruments and I must say they sound fantastic. Also, the interface improvements are quite nice. It seems to be stable, too, as far as I can tell after an hour of playing around.
Does anyone have experience with the newer versions of Service Center? I've had problems with K2 registration, but back then, I could still use the old Regstration Tool. If the current version works well enough to register K3 on Linux, then getting the upgrade is a no brainer for me...