Surfboards used for kiteboarding is the latest rage. The larger surfboard style boards give you amazing float so that you can go with a smaller kite. This is key for wave riding as a smaller kite is faster and will allow you to turn the kite more agressively to actually surf down the wave and change directions quickly.
The surfboard style boards for kiteboarding also allow you to carve a butter smooth turn with the larger rounded edges of the kiteboard.