Eric and I gave a short talk at Maker Faire a few weeks ago about the future of underwater drones. In reality, it was equal parts a history of underwater exploration technology (which is surprisingly recent and wonderfully maker-y).
Here's the full talk:
(Cover photo is via the Fiskardo-Greece Expedition
This is a companion discussion topic for the original entry at http://blog.openrov.com/the-future-of-underwater-drones/