http://download.uk.kde.org/pub/kde/unstable/
Click on that link, you will see:
kde-3.0-beta2/ with a date of 13-Feb-2002
kde-3.0-rc1/ with a date of 04-Mar-2002
kde-3.0-rc2/ with a date of 08-Mar-2002
I'm curious to hear from anyone who has tried any of these.