Have joined but wondered if it was ok to duplicate the discussions on the facebook site for those who are not comfortable with 'social networking'?
Beats me. I guess it is an experiment in outreach. Some folks may be more comfortable with Facebook, others with other kinds of interaction. I don't see too much harm in trying.
We may also be able to get an RSS feed from Facebook to tighar.org; I don't know much about that. That may help with the duplication problem.
Also have you considered Twitter as regular tweets might find an alternative market?
I haven't. I only joined Facebook for the sake of the Earhart Project. I see it has some Twitter-like elements. And there may be some way of linking Facebook to Twitter ...
Marty