I've got the new Kubuntu 8.04 KDE4 Remix running now on my laptop and it is looking really good. I really like the new visual design and it is great that the Kubuntu project team made a release featuring KDE4 available on top of everything else they have had to do to get the main release of Kubuntu out. Up to now I have been running KDE3 and experimenting a bit with KDE4 on a virtual machine, but now I'm making the move full time.