really good pics, i bet you had a wicked vacation!
my only tip/advice: after going to Cuba, taking 100's of pics, i went and bought myself a polarizing filter for my D70, and its been the best investement ive made to date [as far as photography]. this normally takes some ppl a trip to somewhere exotic with clear waters and dozens of pics with super-high glare to realise, but its just a tip.
cheers jake
Believe it or not, the other day when I went out to pick up my new camera, I actually purchased a UV Haze filter. Don't think I would have know they existed if you hadn't mentioned it.