My FX-One came with "sport wings" which extend 30cm outward on both sides, they're not as massive as the one's I had on my old H17 but still very effective.
http://www.hobie-cat.net/download/catalogue/gb/wings.pdf

-Additional leverage in heavy winds and when pointing with under spinnaker.
-In chop your feet dont get kicked/washed of the deck by waves hitting the hull at speed.
-When tacking you are able to power up more quickly since you can slide your (upper)body outward faster without worrying about sliding into the drink.
-Being slightly raised gives you a better view of the leeward bow, for me a very important aspect when blasting downwind.
-When sailing with a crew the helmsman can create extra leverage by sitting on them without actually being trapped out.

During Texel2005 I sailed on an FX-One without wings and missed those aluminum 9.0kg weighing things very much, the points mentioned above are not theoretical but are from actual experience. IMHO these things could easily be made from carbon to bring the weight down. Also a perfect solution for light crews...