Mission scientists are planning a daring pass through that fountain of ice just miles above the Enceladan surface later in the mission. For the secondary mission (2008-10) seven more encounters are planned. The hope is to solve some questions, the main one being: just how warm is it inside this little moon?
Some folks are touting this moon as a prime possible location for extra-terrestrial life. I don’t share their hopes, but I think the geology will be utterly fascinating.
From the wikipedia, here’s a comparison of Saturn’s moon with a major Earth island group: