Kubuntu Gutsy is the latest release from the Ubuntu KDE platform. It has the latest KDE, OpenOffice and many other features. Noticeable among them are inclusion of Dolphin as file manager, this takes Kubuntu one step towards the impending KDE 4.0 release.
I found a great review, you may view it here.
Kubuntu Gutsy Gibbon 7.10 with rich features ~ Linux Mini: "FRIS "