Exit Tax

Word to the wise for those of you planning on visiting Ecuador. There is a $40.80 exit tax that is charged by the government for providing you with the service of letting you leave. You have to pay sometime between checking your bags and going through the aduana/immigration.
They only accept cash and, no, I don't know who's idea it was to add 80 cents to the tax. I assume that ATM charges are ridiculously expensive at the airport, too.