From http://www.youtube.com/FatCatMaui - Alex Aguera CR59 course racing kiteboard at La Ventana, Mexico
UPDATE: 11/09/2010 - The future equipment for kiteboard racing was decided last weekend on the IKA class AGM. From 2011 on, racing will take place in an open division and in a production division, which is strictly box-rule controlled and limited to 1 board & 3 kites that each competitor can register per event - http://bit.ly/IKAGear
Good explanation of how light you can go...
PBKiteboarding 7 months ago