One interestin outreach project for Dawn mission. You can send your name to the asteroid belt. They also restarted Clickworkers project... you are presented a series of images from which you can identify and measure the diameter of craters on two solar system bodies (Mars, Eros). This is preparation for identifying craters at Vesta and Ceres, two asteroids that Dawn spacecraft will explore.

http://dawn.jpl.nasa.gov/getInvolved/index.asp

Edo