New gdm configuration brings accessibility applets to Gnome Panel's notification area.
Binary package hint: gnome-control-
I am using Ubuntu 9.10. It is updated and here is my gnome-control-
I don't konow if there is any other way to configure GDM on Karmic. I used that method:
gksudo -u gdm dbus-launch gnome-appearanc
Now, if you do that you can configure GDM but this brings some accesssibilty applets to notification area on next login.