git : GIT - the stupid content tracker, the revision control system heavily used by the Linux kernel team ( http://www.git-scm.com/ )
patman : Patman tool (from U-Boot) for sending patches upstream ( http://www.denx.de/wiki/U-Boot )
subversion : Advanced version control system ( http://subversion.tigris.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a chromiumos
For Paludis use this rsync : rsync://gentoo.zugaina.org/chromiumos-portage
If you have a problem : ycarus(-at-)zugaina.org