First while this affected the news portion of their site FinCEN was NOT hacked here is a portion of their statement.

The "FinCEN QuikNews" system, a subscriber-based e-mail service that is part of the Financial Crimes Enforcement Network's public website and is hosted externally, appears to have been compromised this morning. We are investigating this incident. This system resides outside FinCEN's security perimeter and is not connected to any other FinCEN systems. Bank Secrecy Act data, and all other sensitive information maintained by FinCEN, was in no way, shape or form compromised by this incident.

To read the rest goto http://www.fincen.gov/quiknews_statement.pdf