I've got this one written down in my diary, it's been there for the last 2 years
Last year was my final year at uni (doing aero engineering), and my thesis was based on a similar topic. It was a design for a high pressure unmanned aquatic robot, designed to be housed inside a cryobot and suitable for subglacial investigation. Ideally, it was designed to be used in both Lake Vostok (subglacial lake in Antarctica) and on Europa, and it's primary purpose was to return photographs and run biological tests on the water. It was very similar to NASA's design for a hydrobot, although I never saw their plans until after it was handed in...
I don't think I'm going too far out on a limb now to say we have both the desire to explore and the technology - I firmly believe that the first positive detection of extra-terrestrial life will be discovered within the next ten years. Whether it's going to come from Titan or Europa (or even somewhere else!) though is another debate entirely....