My guess is that the dollar is probably weak relative to the Aruban Guilder. Aruba is a Dutch colony, and hence its currency most likely is tied to the Euro is some way, and I know the dollar is exteremly weak relative to the Euro.
Your best be would probably be places where the dollar is the local currency, like the British Virgin Islands.
All Aruban businesses also trade in dollars, which might be a plus in terms of stability relative to the dollar.
But thanks for steering me to the conversion chart...I didn't know there was one sitting right on the Yahoo site.