For those of you who have ever wanted to improve your writing in a tropical climate (and who hasn't?), may I suggest this: Costa Rica!
Okay, there's a fair bit of self-interest here. After all, I'm teaching a workshop there in December 2007. But please, give it a look.
In December 2006, I was a resident at the Julia and David White Artists' Colony, where I met Royce Slape. Royce is kicking ass putting this thing together. Yes, please do have a look!