Boards
Boardseeker
Windgirls
Windsport
Windsurfing
Exocet Newspaper

Technique and How-To's:

"Tips from the Pros" - with thanks to Duke Duyck, retired TWC Instructor
The Four Balances of Windsurfing, pdf
Over-powered, pdf
Centreboard Secrets, pdf
---
Knots and how to make them
Royn Bartholdi's [US-221] instructional pages
Guy Cribb's INtuition magazine articles and tips
BlueFinz: tips and technique (all the way from Singapore)

Pretty Pictures:

Surfingsports Windsurfing Gallery I and II