I do not know whether this has already been proposed here before or not,
but Bobbie Sellers from (among other groups) alt.os.linux.mandriva has
brought to that group's attention that there now are readily burnable
.iso images of Ubuntu with the Trinity Desktop.
For those not in the know, Trinity is the continuation of the KDE 3.5.x
desktop environment, forked off from the KDE project itself when the KDE
developers chose to abandon KDE 3 and focus on KDE 4.
For those who prefer the Qt look & feel but aren't happy with KDE 4 -
and very useful now that Canonical has ceased to support Kubuntu. ;-)
News, instructions and links to .iso files and other useful things