gnome-themes-egtk : The official elementary GTK theme designed to be smooth, attractive, fast, and usable. ( https://launchpad.net/egtk )
gtk-theme-oxygen : Oxygen-Molecule KDE and GTK+ unified theme ( http://www.kde-look.org/content/show.php?content=103741 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a wavilen
For Paludis use this rsync : rsync://gentoo.zugaina.org/wavilen-portage
If you have a problem : ycarus(-at-)zugaina.org