I think you're right about the surfy feeling, cause that's how alot of surfboards and wakeboards are made. After doing some more reading though I don't think the Skate Banana has a convex base, there's another model that Lib is/was testing and hopefully going to release for the 07/08 season called the Banana Hammock, and it is reverse camber and sidecut with the convex base, here are a couple shots I found, click and blow them up to get an idea of the shape: