V2 Underwater Case
It took some time (maybe 7 or 8 months) before cases appeared for the V1, but they are available and reasonably priced. I have the one marketed under the Polaroid brand and took it recently on a trip to Hawaii -- worked great for snorkeling, and is rated at 40 meters. It's designed for the 10-30 lens (won't permit zooming, i'll add, unlike the Nikon cases, but at $130, not surprising). It works well with the 18.5mm f/1.8 in addition to the 10-30 lens.