I ran across this article on underwater drones and thought you all might like it. Incidentally, The Living Moon site had some of the forerunners of these on the site.
http://www.livescience.com/61431-underwater-drones.html?utm_source=notification
Via the Livescience site..!!
(http://img.purch.com/rnb/400x250/aHR0cDovL3d3dy5saXZlc2NpZW5jZS5jb20vaW1hZ2VzL2kvMDAwLzA5Ny83ODYvb3JpZ2luYWwvdXdkLTEuanBn)