Buzzfan - this reply may be too late for you, but anything that affects the overall U.S. economy (which Katrina may) or the price of fuel (which Katrina certainly has) will lead to a rise in our dollar. In other words, short-term, our dollar should strengthen - although as it nears $.85 U.S. I gotta believe both our feds and the Bank of Canada are starting to worry that it is simply too strong, and could start to act as a drag on our economy.
Trouble is, what are they gonna do about it? Normally, you would cut interest rates, but how far lower can they go? And the continued explosion in oil prices will most likely more than offset a rate cut. It seems we've weathered the 40% rise in the loonie over the past couple of years fairly well, but something's gonna give sooner or later ...