Hey Yoyo - this table from earlier this year looks like it may need some adjustment, if you are interested?
WA Windsurfing Speed - All Time Top 10 for 500m
1 Peter Dans (25)......................38.50 knots.......30.12.2007.......Mandurah
2 Chris L (Slowboat)...................38.40 knots.......27.09.2005.......Pt Walter
3 AlbyVdB (Elmo).......................37.90 knots.......30.12.2007.......Mandurah
3 RobbieR (82)..........................37.57 knots........31.12.2005......Pelican Pt
4 SteveS (Snides8)...................36.30 knots........30.12.2007......Mandurah
5 TimS (tim90)..........................35.93 knots.......30.12.2007......Mandurah
6 DavidB (Yoyo)........................35.72 knots.......26.03.2007......Pt Walter
7 Claude (181)..........................35.10 knots.......30.12.2007......Mandurah
8 JosephP (Hardie).....................35.04 knots.......05.12.2007......Mandurah
9 Dan (KA-18)...........................35.02 knots.......12.09.2007......Pt Walter
10 ChrisA (Aus1111)...................34.99 knots.......05.12.2007......Mandurah
The challenge is out, 36 will see you in the top 5 all time 500m on WA waters