Well I took the plunge,through gritted teeth,and after following instructions from a "techie" friend (so he says),I installed the brand new KDE 4.0 Desktop on Kabuntu.
At first,the desktop froze,after loading,but two reboots later,and I was up and (looking).
The taskbar is (huge),black,and quite a shock to the eyes.Where has the Start button gone? It is now,on my desktop anyway,a bright blue arrow,facing left.I kid you not.single clicking brings up a menu display.All I will say about this is,hover your mouse over the list,and like magic,apps appear.Oh yes,and in the top right-hand corner of the Desktop,there is an Add Widget icon.I now have a digital clock top center of my monitor screen.Sad I know,but I have only just installed this tonight.
So far my media files play,even though I had to "Mount" my external drives via Nautilus,but I'm not too bothered.
The provided wallpaper is OK,if a bit dull,but you can use your own.

Any one else took the plunge yet? :D