Check out the full frame camera shot of Vesta at: http://www.nasa.gov/mission_pages/dawn/multimedia/pia14317.html
What really intrigues me the most is the very fresh looking impact crater in the near center that has dark material exposed - perhaps lower layer of lava as in a diogenite meteorite? You can see the ejecta rays in the full image - the impactor probably came in from the lower right.
As Dawn spirals down ever closer to the surface our views will get better and better. I can hardly wait to see the interior of that crater and get the data as to its composition.