...for political reasons? link
The alleged hacker says it's because of SOPA, the "stop online piracy act" which will actually infringe on the freedom of speech online.
The government should track the guy down and hire him. It wouldn't be the first time.. link
SOPA my bottom. Don't underestimate the force of ego driven twerpdom and "because it's there" in these kinds of incidents. As Assange demonstrates at the heart of it a lot of these types are fundamentally selfish and cowardly.