Can't speak for any local divemasters, as last time I was down there a friend hooked us up with a great guy who used to be a dive instructor in the British Navy. Took us out about a mile off the beach across from the Atlantis to a spot called Triple Wrecks in 90 feet of water. He took me through the hold of one of the wrecks and out a porthole; lots of fish in there, and it was a beautiful dive, but I remember a slightly disconcerting feeling looking up from within the ship's hold and seeing nothing but black. Very, very exhilarating.
Its my understanding there's another local spot where a ship and a plane from some of the old Bond movies are resting. That sounds like fun too.