Update: some quotes from the video ...
Catherine from OCHA (the UN Office for the Coordination of Humanitarian Affairs): "Basically it's the best source of transportation information that we have for Haiti ... it's the most comprehensive one, and the most up to date, of course. This is information that everyone is using here. There is a big GIS group here for this humanitarian response, and everybody is using OpenStreetMap."
Schuyler: "OpenstreetMap was used for the UNOSAT building damage assessment ..."
Olivier from UNOSAT (UN Operational Satellite Applications Programme): "Of course we used OpenStreetMap on a daily basis ... every day it was possible to improve our maps ... with new information. Usually it is impossible to get this information ... so thanks to this volunteer platform, it has been fantastic for us, that's for sure."