We should add some settings to make gtk load the required modules for communication with a screen reader, like Orca. There are 2 possible ways to load these settings: using a environment variable (GTK_MODULES=gail:atk-bridge) or using GtkSettings which we can probably control in some way though the xsettings.
I would also really like to see this as I am currently looking into using dogtail[0] as a way to perform automated testing for the Fedora Xfce Spin (and any other distro that would like to borrow the code as it will we freely available). Adding myself as a CC to the bug as I would like to follow its progress. -AdamM [0]https://fedorahosted.org/dogtail/
This landed in master a week ago. Xfce4-session takes care of the environment variables and launches the at-spi daemons before anything else. Setting to enable this in the accessibility dialog of xfce4-settings.
See also http://wiki.xfce.org/releng/4.10/roadmap/accessibility