x11-libs/pango-1.18.1 was released on 2007-08-28.
... and added to the gnome-experimental overlay the day after that. Inclusion to the portage tree is pending extensive testing of glib-2.14 and pango-1.18 on an otherwise fully GNOME-2.18 system. Personally I am waiting for gtk+-2.12.0 to get released before conducting such testing, unless its release delays more than till Tuesday or so.
Masked in CVS. Unmasking is due Real Soon (tm)