Hi Neng.
Great pics! Thanks for sharing!
Coincidentally I've also posted some pics from Pinarro (please check the post "Pinaroo Pics (26 Nov 11) & Questions"). And we caught the same sailor lol...he's indeed a local windsurfer from Pinaroo hehe
I used to have the 70-300mm..It has a good reach. Now I'm using a 70-200mm f4 L. Awesome lens, but I missed the reach...so I added a 1.4 converter to give me 280mm.
Excellent duck jibe capture! There's nothing like shooting in burst mode and continuos servo focus.
I'll definitely go back to Pinarro to windsurf and shoot during my sessions breaks for sure (I'm still a better photog than windsurfer

). You should see me around...cheers!
PS: You also did a good job keeping the sea level horizontally..that's something I pay attention while shooting.