Federal Reserve Bank of Cleveland, FedComp

A foreign national responsible for fraudulently obtaining or holding 400,000 credit card numbers was caught in the U.S. while attempting to meet hackers and utilize stolen financial information. The man is also accused of hacking into the Cleveland Federal Reserve Bank in June, though the amount of information he was able to obtain is unknown and separate from the 400,000 card numbers found on his computer.UPDATE (4/13/2011): The foreign national pleaded guilty to hacking into a Federal Reserve Bank
computer server belonging to the Federal Reserve Bank, and installing a
malicious code onto that server. 
The man had compromised many other computer servers that belonged to
large corporations, financial institutions, defense contractors and other
groups, and selling or trading the information. Because FedComp, a data
processor for federal credit unions was affected, financial information from
federal credit unions in various states may have been inappropriately accessed.