According to various news reports, like this one, the latest federal agency to have been hacked is the State Department. The suspected attack was detected on Friday, causing the State Department to shut down its entire unclassified email system. The State Department diplomatically refused to speculate on the source of the attack, but those of us who are less diplomatic can speculate that the attack likely originated, as has many others have, from China. There is no official word as to when the email system would be back up and running, although there is some speculation it might be as early as later today or tomorrow.
In the meantime, if you have something to say, you can always call the Response Team or, for a faster response, dig a stamp out of a drawer somewhere, stick your question in an envelope, and go try to find a mailbox.