The Google Maps team has been working hard with partner GeoEye to push out an updated imagery of Haiti. The update includes imagery taken at 10:27 am EST on Wednesday, January 13 - approximately 15 hours after the earthquake hit.
You can download the KML file to view in Google Earth and the layer is available for viewing in Google Maps as well.
The imagery is primarily for Port-Au-Prince. Google says they'll add more imagery, but you only need to download the file once.
Here's what the imagery looks like in Google Earth:
Random damage imagery