Thanks all, I will try Air Asia this time.
In late '07, for my long-awaited 3 month trip to Mui Ne, I took Vietnam Airlines from SG to VN, with a board, 2 masts, 2 sails, 1 boom, and about 3 pairs of underwear...they told me that my equipment (not the underwear) was too large for their cargo containers, but I begged and pleaded until a kind (Singaporean) manager said they would be able to take it after all.
When I arrived in VN, the bags were all dirty and greasy, so I presume they put them in a different part of the aircraft to the rest of the baggage. Luckily nothing was broken and I had 3 months of insane windsurfing!!!
Still, I don't want to push my luck, so this time I'm trying to be more careful...thanks again for the advice.