There's a thread on the forums regarding stuff 'missing' in KDE 4:

http://forum.mandriva.com/viewtopic.php?p=496883

the KDE 4 version of kdesu does seem to be missing from our repos. As I
write, kpf seems to have disappeared from KDE 4 and been re-incarnated
as something named kepas , so it might be nice to package that. KDE
guys? Thanks!
--
adamw