Stumbled onto this post through google - after doing some search.
Not sure if you aware of the Manus Professionals for Community Development Inc - (www.developmanus.org) .
The key activity also is a Manus mailing list that brings together 800+ Manusians around the world together to discuss issues concerning Manus. http://groups.google.com/group/manus_png/topics) - One of the long term projects which is to be looked at is Tourism opportunities.
Be good to get on the list and share your thoughts also.