The Lunar and Planetary Lab at Univ. of Arizona released 1,005 new images from the Mars Reconnaissance Orbiter's HiRISE camera, totaling 3.4 terabytes. The images cover the period of April - July, 2008.
UA has released 7,100 HiRISE images so far, totaling 26.9 terabytes.
There is a section on the HiRISE Web site with 3-D photos that are being used to evaluate potential landing sites.