Nope, never added. Still on our list, but we basically pushed it back. The reasoning was that since user's registering through Joomla would still get the email, it makes it less common that admins would want those emails sent, but not the Facebook ones. It is something we're planning on doing, but just a lower priority. Hopefully, you can still get your work around in there of commenting out the line or 2 in the other thread. If you need assistance though, just let us know.
Thanks,
Alex