Yannick/Ycarus has been running a very usefull website for some time (http://gpo.zugaina.org/; GPO = Gentoo Portage Overlays) allowing you to browse and search ebuilds from all overlays known to the layman registry. Recently he added the trees gentoo and funtoo to the database. So while there may still be ebuilds flying around on the net or on bugs.gentoo.org that website finally allows access to the majority of ebuilds in one place. Awesome!