Windguru - The most popular wind forecast site, has a specific El Yaque forecast, is very useful!
http://www.windguru.cz/int/index.php?sc=3607
Windfinder - Another weather forecast site, again has specific El Yaque forecast.
http://www.windfinder.com/forecast/el_yaque
Cabrinha - One of the biggest kitesurf brands around. Margarita Xtreme use all the new 2011 range
http://www.cabrinhakites.com/
Endless Wind Kitesurf Holidays - Learn to kitesurf in Brazil or for the experienced take an adventure with the endless wind IKO team and explore some of the best kitesurf spots in the world.
http://www.endless-wind.com
MBK Kiteboarding- Professional IKO School in Poole Harbour, UK, owned by Mike Bobin
http://www.mbk-kitesurf.co.uk