Well, as for me and my U3S, everything works excellently except for a built-in GPS module (which I have not tried to investigate into very much, though). There is not much to be done to let Linux work on their hardware for ASUS, as far as I can see. If an issue is present in some distro and is absent in others, it is a problem of the distro, not the hardware manufacturer, imho.
No announcement yet.
Doing More For An Open NVIDIA