BBCnews is carrying this article summarizing some new discoveries made after examination of the data gathered during the last close Cassini flyby of Titan. Radar imaging seems to have detected "cryovolcanos"... volcanos that erupt not molten rock, but molten water. Currently this provides a neat explanation for why Titan's surface seems so "new", almost completely lacking in impact crater features. Hopefully the upcoming Heugens probe launch will provide much more data.