And AGAIN (please also use search option of the forum please), do not expect too much, the KDE4 version at this moment is a preveiw one only, it is not fully featured, i.e. the important services (like package manager, network manager and so on) are not yet implemented.
So officially Pardus is still in KDE 3.5.10 status.
However I have the impression that Pardus 2009, which will have KDE 4.2 by default will not take very long anymore to be released.
See also Pardus 2009 Roadmap
(turkish version says it is 28% finished)