I recently picked up an RX100 with Ike housing and a single YS-D1 strobe to start scratching the u/w photo itch. These were all shot off Provo in Turks and Caicos and is really the first time out with the camera, as well as attempting u/w shots. They were also shot in jpeg, so I really need to switch over to RAW.
http://sdrv.ms/14MuZos
http://sdrv.ms/14MuZos