This page http://www.gentoo.org/proj/en/desktop/kde/ points to genkdesvn.sf.net and http://overlays.gentoo.org/proj/kde/wiki. This is quite outdated and should be changed to http://genkdesvn.mailstation.de/ where the most current kde experimental ebuilds live. Probably quite important, as that's the page the official kde 4.0 announcement points to.
Fixed in CVS, thanks for reporting.