KDE test: failed!
I tried KDE-4.5.4 on PixieLive (with EMGD drivers) and...
Basically kwin failed, because on my EEEPC 1101HA (with GMA500), equipped with kernel 2.6.35 and EMGD-1.5 drivers with compositing enabled it wasn't able to show anything. Without composition (a.k.a. Desktop Effects) it was working, but it was so slow to be unusable.
So, the next release (coming soon) will stick to gnome-2.30, but it will include QT libs for programs which need them (e.g. skype)