I cant find anywhere that actually says these speeds have been 'ratified' yet.... so as far as I know they are still unofficial.
Also - the guy in the pic only held the (unratified) record for a matter of hours (how gutted would u be!?), before someone else went even faster! Still - 1st man past 50kts over 500m is probably the more important achievement.
* Subject to WSSRC final ratification
Spd(kts) Name
50.57 Alex Caizergues Kitesurfer
http://uk.youtube.com/watch?v=v0Ro6iWaBgg50.54 Robert Douglas Kitesurfer
50.52 Sebastien Cattelan Kitesurfer
44.74 Bjorn Dunkerbeck Windsurfer
.....