It goes back to the HD-DVD stuff from last week (or two weeks ago?), and the DMCA.
From what I understand, some 128-bit number (starting with 09 ...) was posted on the Internet, including on Digg. Digg was sent a DMCA takedown notice for the number, calling it a copyright circumvention device. Digg complied with the notice as required by [a stupid] law, which pissed off a lot of people.
As a result, a massive number of Internet users protested this decision, posting the number everywhere, basically making it impossible to fight. This act of protest (or, as some American news called it, terrorism) did wonders to demonstrate the impossibility of censoring the Internet.
So yeah, that number that was posted apparently constitutes a copyright circumvention device.
I probably could have just said that and saved myself a lot of typing, but eh? I probably should have said all that in the initial post anyways.