This is what I have so far and will add to it as more information emerges:
Google Crisis Response Map of the Chile Earthquake
According to a blog at OpenStreetMap, Rapideye has made available to OpenStreetMap satellite images of areas of Chile affected by the earthquake. The images are copyrighted but can be used to add data to OSM.
For information on how to include these images into JOSM and Potlatch see
Crisis Commons nothing posted here yet.
Quake Finds Tsunami Forecasts Still Limited Kenneth Chang, March 2, 2010, The New York Times (registration required)
Satellite Images and GIS Aid in Tsunami and Earthquake Disaster Recovery Satellite Imaging Corporation