For those considering the purchase of this system, we've come up against a problem with the new S80 in the WP-DC1 waterproof case. Shutter speed and aperture are controlled through the scroll wheel (Multi Control Dial), which is not accessible through the WP-DC1 housing.
As you know, the control of shutter speed and aperture are important functions when used with wide angle lenses and external flash units sold with many underwater packages. It's kind of like supplying all the pieces to a puzzle but they don't fit together!
NOTICE: This post has been revised, see my post below on the S80's Undocumented Feature which controls shutter speed and aperture through the housing.