I've been to the island and I'm active in the Pitcairn community here in New Zealand. The island is a vibrant community of people working. When I was there they were very warm and welcoming. The island itself is small but with mountainous areas and there is much to see and do. The vibe on the island is very similar to any small rural town in New Zealand.
I have photos of the trip if anyone is interested http://cd.pn/pn2012/