As promised, here are some shots of the 2009 RRD WaveTwin 99. Its very compact at 225x62 for its 99 liters.
In the wavetwin board line, its the largest in volume, but the shortest by far. While its technically the big board in the line, I think its a standalone shape purpose built for maximizing "real world waves" found by most sailors outside of Maui/Baja.
The 99 offers surprising upwind performance. I initially was worried about its upwind ability for side-on wavesailing on Lake Michigan where upwind capabilities are needed for survival. Not an issue. ;-)
Volume distribution lends lends to suffering on curve jibes - this might hamper true down the line wavesailing, but makes up for it with amazing tight capabilities that enable the sailor to make the most of ugly, unorganized waves.
The Wavetwin jumps really well - The outline of the board give amazing pop - giving higher aerials and more loft on high jumps.
In summary : This board isn't for everyone. It requires a different stance in getting the board to perform, and you have to your A game on at all times else the board can bite ya in the ass. Sailors who make the commitment will be rewarded with stellar performance in a compact package that will turn any light air wave day into a perma-grin sesh.