If you want to have FW partners, the best is Porticcio near Ajaccio
http://www.le-cnp.fr/
On the 06/07/08 there's à race "La transGolfe" where you can fight with the islanders...
A good start to be introduce in the country
But if you want to sail in slam or Bump & Jump, you have to go in the south near Bonifacio, the wind is stronger
La tonara on the west coast
Piantarella on the est coast
http://www.bonifacio-windsurf.com/
You can find somme pics and "bon plan" good deals on the site