From the press release:

DigitalGlobe has collected over 120,000 km2 of high-resolution color and black and white imagery of Haiti since activating the Crisis Event Service on Wednesday, January 13. And yesterday, we re-imaged virtually the entire country, adding another 75,000 km2 of new imagery. View the Haiti coverage map to see how the DigitalGlobe Constellation has achieved this remarkable coverage.

Interactive, browser-based image viewer
In order to view and compare multiple imagery collects more easily, we have created an interactive imagery browser based on our Crisis Event Service, and Open Layers. View the Haiti Imagery Browser …