I'm missing Lost. But this is a, literally, astronomical revelation.
Here is Emily Lakdawalla's first tentative post on The Planetary Society weblog, saying that Cassini may have captured lakes on Titan.
Here is her full article entitled, 'Cassini RADAR Reveals Lakes on Titan At Last'. I'll leave you in suspense as to whether or not her inital blog post was premature. ;-)
And here are the radar images themselves, on the Cassini Homepage.
If swimming in intensely cold hydrocarbons sounds like your kind of thing, you should probably set off now. Saturn is a long way away.