A BBC news story reports that Titan is geologically active. In an earlier blog I had suggested as much, though gone much further than "geologically active" with the notion that Titan has an active volcano. I guess we'll have to wait and see but it looks like there might well be some kind of volcano in the southern hemisphere of the satellite.
A more interesting question is - how the hell is it geologically active? Could Titan be extremely young and if so where did it come from - the core of Saturn? Or is there some kind of process of induction going on between it and Saturn that generates copious amounts of heat? Or did it suffer some kind of catastrophic impact that provided it with enough heat to become active and seeded it with hydrocarbons? Or is it not a volcano at all, and there is actually an alien factory belching out smoke?