I must say, the switchover to Kubuntu 6.06 went very smoothly and painlessly, even considering your host's considerable (ahem) Linux experience. I completed the installation in about half an hour or so last night, and started the customisation/tweaking at about nine this morning, and by noon I was pretty much done. My desktop is practically identical (in both look and feel and functionality) to the previous distro -- Mandriva -- minus Mandriva's glitches. Mind you, I have not really started working on the development tools -- gcc, CVS, Anjuta, etc., but all my day-to-day needs are taken care of.
Going to reward myself with a perfect cup of tea.