Anonymous Hacks RIAA, Universal Music, Justice Department Websites

In response to the Federal shutdown of Megaupload, hacker collective Anonymous has claimed responsibility for taking down websites for the RIAA, Universal Music and the Justice Department. Per their Twitter:

We'll post updates as/if they come in.

UPDATE: Gizmodo reports MPAA.org, too.

UPDATE 2: Gizmodo reports that the website for the US Copyright Office, record label BMI and French authority HADOPI have all been taken down.