Many of the images are from the navigation cameras -- Navcams -- which have just been activated by mission controllers.
One image shows the rover looking down onto its desk from above (See above image, provided by NASA/JPL-Caltech/MSSS). Another one shows a 360-degree panorama view of the Gale Crater.
The NASA article "First 360-Degree Panorama From NASA's Curiosity Mars Rover" features one especially interesting image, that of a "color full-resolution image showing the heat shield of NASA's Curiosity rover [that] was obtained during descent to the surface of Mars on Aug. 5 PDT (Aug. 6 EDT)."
John Grotzinger, the project scientist for the Mars Science Laboratory (MSL) mission, states, "These Navcam images indicate that our powered descent stage did more than give us a great ride, it gave our science team an amazing freebie."
Check out these Curiosity images at the NASA website: Mars Science Laboratory (Curiosity: NASA's Next Mars Rover).
The NASA article continues with, "Curiosity carries 10 science instruments with a total mass 15 times as large as the science payloads on NASA's Mars rovers Spirit and Opportunity. Some of the tools, such as a laser-firing instrument for checking rocks' elemental composition from a distance, are the first of their kind on Mars. Curiosity will use a drill and scoop, which are located at the end of its robotic arm, to gather soil and powdered samples of rock interiors, then sieve and parcel out these samples into the rover's analytical laboratory instruments."
And, "To handle this science toolkit, Curiosity is twice as long and five times as heavy as Spirit or Opportunity. The Gale Crater landing site places the rover within driving distance of layers of the crater's interior mountain. Observations from orbit have identified clay and sulfate minerals in the lower layers, indicating a wet history."