Pretty interesting, though it could be nothing.
For those who don't know, the USSC is the United States Sentencing Commission.
UPDATE: Looks like the hacked site has now been taken down. Actually, you can still access the site through it's ip address: http://220.127.116.11/. The site is mostly back under control, although it seems to be somewhat slow. You can still see the video that was on the hacked front page here: http://www.youtube.com/watch?v=WaPni5O2YyI
Appropriately, the mainstream media has now just started to pick up on the story. Here are some links: