if you're like me and find yourself using gnome software more than KDE and like the speeds of gnome.. here's a quick 4 step guide to removing kde from your system
1. emerge gdm
2. edit your /etc/conf.d/xdm to boot with GDM
3. run this script as root: for p in /var/db/pkg/kde-base/*; do echo $p|sed -e 's#.*/#=#'|xargs emerge -C; done
4a. remove the rest of the KDE packages in your applications lists that are used by KDE or
4b. revdep-rebuild X to fix broken packages that have KDE dependencies