@umbra21 - I don't think I completely understand exchange rates and why they change from day to day. I especially don't understand how people can manage to use that change to make money.
But, I work online and often get paid in foreign currencies, so I'm usually checking the rates and trying to guess when they are going to go up or down.
It always turns out that I changed my money over too soon or too late, but oh well. Still, I agree, being able to check cross rates online is a godsend.