The sequel to Into the Blue is currently being shot in Hawaii. For more details, go here

Normally stunts and special effects are REALLY lame, like the latest Indiana Jones flick, where real stunts were replaced with ridiculous computer animated stunts like a German amphibious open top car with no seat belts plunging nose down 300 feet into the water and all stayed in the car...TWICE (it got worse the 3rd time) but at least Into the Blue had some interesting dive footage that was well shot.