So I'm up at ols... and I finally decided to figure out all the gnome bits. This bug represents all that needs to be unmasked for gnome. It probably duplicates several other bugs but o well... web access hasn't been the best here.
this seems like the best place to post. added ~ppc64 keywords to the following packages and they compiled successfully: gnome-extra/gcalctool/gcalctool-4.4.19.ebuild gnome-extra/gal/gal-2.2.1.ebuild net-print/libgnomecups/libgnomecups-0.1.10.ebuild app-admin/gnome-system-tools/gnome-system-tools-1.0.0.ebuild net-analyzer/gnome-nettool/gnome-nettool-0.99.3.ebuild gnome-extra/evolution-data-server/evolution-data-server-1.0.0.ebuild net-libs/libsoup/libsoup-2.2.0.ebuild dev-util/desktop-file-utils/desktop-file-utils-0.9.ebuild gnome-extra/gnome2-user-docs/gnome2-user-docs-2.8.0.1.ebuild gnome-extra/zenity/zenity-2.8.0.ebuild x11-terms/gnome-terminal/gnome-terminal-2.7.3.ebuild x11-libs/vte/vte-0.11.11-r1.ebuild app-text/ggv/ggv-2.8.0.ebuild gnome-extra/gnome-system-monitor/gnome-system-monitor-2.7.0.ebuild gnome-extra/evolution-webcal/evolution-webcal-2.0.0.ebuild gnome-extra/gnome-games/gnome-games-2.6.2.ebuild gnome-extra/gnome-media/gnome-media-2.8.0.ebuild media-plugins/gst-plugins-ogg/gst-plugins-ogg-0.8.3.ebuild media-libs/gst-plugins/gst-plugins-0.8.3.ebuild media-plugins/gst-plugins-oss/gst-plugins-oss-0.8.3.ebuild media-plugins/gst-plugins-vorbis/gst-plugins-vorbis-0.8.3.ebuild gnome-base/nautilus/nautilus-2.8.0.ebuild net-print/gnome-cups-manager/gnome-cups-manager-0.23.ebuild net-misc/tsclient/tsclient-0.132.ebuild app-admin/gnomesu/gnomesu-0.3.1.ebuild x11-libs/libzvt/libzvt-2.0.1-r2.ebuild app-editors/gedit/gedit-2.8.0.ebuild x11-libs/gtksourceview/gtksourceview-1.0.1.ebuild gnome-extra/yelp/yelp-2.6.2.ebuild gnome-extra/gucharmap/gucharmap-1.4.1.ebuild gnome-extra/libgtkhtml/libgtkhtml-3.2.1.ebuild gnome-extra/bug-buddy/bug-buddy-2.8.0.ebuild gnome-base/control-center/control-center-2.8.0.ebuild gnome-extra/gnome-utils/gnome-utils-2.8.0.ebuild app-text/gpdf/gpdf-2.8.0.ebuild gnome-extra/gconf-editor/gconf-editor-2.8.0.ebuild gnome-extra/nautilus-cd-burner/nautilus-cd-burner-2.8.2.ebuild there are a few blockers to 2.8. mozilla, nss.
*** Bug 72542 has been marked as a duplicate of this bug. ***
gnome-2.10 is ~ppc64 now.