bootutils : Collection of utilities to facilitate booting of modern Kernel 2.6 based systems using initramfs. ( http://bootutils.sourceforge.net/ )
upstart : Event-based replacement for the /sbin/init daemon. ( http://upstart.ubuntu.com/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a dev-zero
For Paludis use this rsync : rsync://gentoo.zugaina.org/dev-zero-portage
If you have a problem : ycarus(-at-)zugaina.org