Good timing - this topic is on my mind too!
I have heard of the sea salt trick, but never tried it. Like Rute, ocean water at the beach makes my hair curl but awfully dry. Did you spray the solution on while your hair was wet? Or dry?
When in Hong Kong, I'd blow my dry straight each morning, but within 15 minutes of walking outside, my hair would curl. Nothing could stop it from curling! The humidity was 90%. I like the effect when it does this, but I've never been able to recreate it on purpose. It just happens. If I let my hair air-dry naturally, it just looks like a frizzy mess.
Here are pics from the trip so you can see - each day it looked completely different! I would love to be able to recreate non-frizzy, loose curls like this for a change of pace:
http://s386.photobucket.com/al.....ong088.jpg
http://s386.photobucket.com/al.....ong248.jpg
http://s386.photobucket.com/al.....ong273.jpg
... and my personal favorite, taken at the Peak, which was windy! (This pic cracks me up)
http://s386.photobucket.com/al.....ong165.jpg