This image was acquired by NASA's Phoenix Mars Lander's Surface Stereo Imager (SSI):

http://www.nasa.gov/multimedia/imagegallery/image_feature_1120.html

Nice image! Thanks for posting that link. I checked out some of the other images from the hubble site. Great stuff.

Link: http://hubblesite.org/gallery/album/

A good blog site if your interested in unmanned space flight, e.g. the Phoenix lander.

http://www.unmannedspaceflight.com/

There are a number of real insiders that know what they are talking about on that site. A good place to find out what is happening before it hits the official news channels.

edit: spelling