systemd : System and service manager for Linux ( http://www.freedesktop.org/wiki/Software/systemd )
systemd-shim : A systemd emulation layer for Gentoo running with OpenRC ( https://github.com/desrt/systemd-shim )
sysvinit : /sbin/init - parent of all processes ( http://savannah.nongnu.org/projects/sysvinit )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a systemd-love
For Paludis use this rsync : rsync://gentoo.zugaina.org/systemd-love-portage
If you have a problem : ycarus(-at-)zugaina.org