tectonic posted a quick guide about installing KDE 4 on Ubuntu Linux
A quote from the article:
>> KDE 4 preview on Ubuntu
If you’re eagerly awaiting the release of KDE 4.0 on January 11 and you’re running Ubuntu then get a taste of the next big thing by installing KDE 4.0 release candidate 2 in three easy steps.
>> KDE 4 preview on Ubuntu