BTW, if you downloaded original alpha2 yes IT IS ALPHA and an early one at that
Since then the updates have made it quite stable even though its still "ALPHA"...
I have high hopes for Alpha3 where they will also test nouveau and NVIDIA proprietary support to make it smooth
All in all, its looking really good this time, especially yes, with KDE 4.4 also.
@madnav: i hope you have read the other threads in this section (grub2/plymouth eyecandy etc) - lots of cool stuff in development