The photos are coming in from Huygens. These first two were taken during descent, from an altitude of about 16km. Isn’t the second one freaky?
And here’s the first shot from the surface itself:
Check out the Planetary Society’s Huygens Blog for scientific commentary on these images, and a story on Huygens’ first pictures from Spaceflight Now.
Update: More science on those photos. Apparently the rocks are blocks of very frozen water ice.