
A class action lawsuit against Visa, MasterCard, and Diner's Club has gone to settlement. If you used a credit card to make a foreign currency transaction between February 1, 1996 and November 8, 2006, you are eligible to receive a minimum of $25 to repay you for getting screwed on the currency conversion. As I read it, you may be eligible for more than $25 if you can provide documentation that you got screwed for big money and deserve a bigger refund.
More details here.