I'll be experimenting with the Minion:
Minion is a small, low cost dev board with a wireless radio, ready for the Arduino environment with no need for your own Arduino board.
I'll keep everyone posted once i get it working!
FYI, My purpose is for snorkeling and Snuba, a little different than most OPENROV Projects, plus my camera will not be tethered, just recording. Hope to test it for a dive out of curiosity