Be sure to check out the NASA/Jet Propulsion Laboratory's site for news on the Cassini-Huygens Mission to Saturn. Lots of interesting information and images. As well as casual observations such as
One early result intriguing scientists concerns Saturn's Cassini Division, the large gap between the A and B rings. While Saturn's rings are almost exclusively composed of water ice, new findings show the Cassini Division contains relatively more "dirt" than ice. Further, the particles between the rings seem remarkably similar to the dark material that scientists saw on Saturn's moon, Phoebe. These dark particles refuel the theory that the rings might be the remnants of a moon. The F ring was also found to contain more dirt.
Yep. You can't know until you go.