Add: deb http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu jaunty main to your /etc/apt/sources.list or even within KPackageKit and do an sudo apt-get update and sudo apt-get upgrade.

They have made some awesome improvements to the System Settings control panel. They have made some awesome improvements to the information area of the kicker and changes the Wifi plasmoid that I don’t totally understand. The system tray is now collapsible. There is a new feature that allows you to peek into folders and displays some of the contents of the folder on the icon. There are now a lot of options for your desktop including using marble to display the moon as your desktop and stuff like that. I am glad to see that there is a constant improvement of KDE.