I came across a photo today on Facebook of a SUP catamaran made by the folks at SIC (Sandwich Island Composites) on Maui. Someone commented saying something along the lines of this being a new thing. In truth, it has been done before, and I remember a design by Ron House a few years back.
Read more about this concept on Standuppaddlesurf.net..
Ron House Catamaran, or Standmaran.
2010 Article & photos of an early SIC design.
Test drive video of the SIC S-16 Standamaran
SIC doesn't have this new (green) standamaran on their site yet. http://www.sicmaui.com/