In case you can't see it, it says
Dear Cardholder:Uh oh.
We have been advised of a very large data breach impacting millions of credit and debit card numbers. Your card information may have been compromised... the best course of action is to reissue your card... please destroy your old card and begin using this new one immediately... please verify all transactions that post to your account each month by reviewing your statement carefully."
UPDATE: Liz Kay reports that hackers used software to steal card numbers processed by Heartland Payment Systems Inc., the country's 6th largest credit card payment processor.