Canon SD800 Wide Angle + WP-DC9 Underwater Housing.
This camera and housing has been great! I do not think they make the sd800 anymore but the sd870 is canon's new wide angle point and shoot and the WP-DC17 underwater housing.
This little duo has allowed me to share my adventures with all my friends and the whole wide world. You will spend about $500.00 for the combo with extra batteries and an 8mb sd card but that is chump change campared to the cost of the next best options.