Kubuntu 8.10
Just upgraded to Kubuntu 8.10. KDE 4 is very different from KDE 3.5. So, I’ve been getting used to it and the “plasma”. Two things that must be installed is powerdevil (for power management) and quicklauncher.
For powerdevil (http://www.kde-apps.org/content/show.php/PowerDevil?content=85078): sudo apt-get install powerdevil
Reboot so the service is started, and you can modify your settings in System Settings > Advanced > Power Management
For quicklauncher, you need to compile it yourself (which needs kdebase-workspace-dev). You can get the source from http://www.kde-look.org/content/show.php/QuickLauncher+Applet?content=78061.