[ebuild N ] dev-libs/libIDL-0.8.4
[ebuild N ] gnome-base/orbit-2.12.0
[ebuild N ] gnome-base/gnome-mime-data-2.4.1
[ebuild N ] gnome-base/gconf-2.8.0.1
[ebuild N ] gnome-base/libbonobo-2.8.0
[ebuild N ] gnome-base/gnome-vfs-2.8.1-r2
[ebuild N ] app-arch/zip-2.3-r4
[ebuild N ] net-www/mozilla-firefox-1.0
firefox now use gtk2, and the list is quite short to me.
libbonobo is needed by most gnome programs.
mozilla will cost you about 3-4 hours while all the others for less than 1 hour