Release of the Encryption HD-DVD Key Puts Digg and Google in Trouble?

Everybody knows Digg.com and Google. Yesterday, following the release of the encryption key supposed to protect HD-DVD contents, lawyers acting for the MPAA and Advanced Access Content System (AACS) have sent dozens of cease and desist letters, even threatening administrators to take their websites down with a DMCA notice.
While trying to obey to request, Digg founders were heavily criticized by community members pushing Digg Staff to change their mind and leave message referring to the encryption key online. So Digg is getting ready to fight with the AACS. Lawyers went even further by trying to force Google to stop publishing links/messages containing and/or related to the encryption key; something almost totally impossible to do taking into account that web users have already found ways to communicate the key in an almost non identifiable format...
One can already order T-shirt with the encryption key printed on... as it was the case when the CSS key was cracked.
For sure by attacking a popular community website, the AACS is getting ready to fight a symbol of the internet community. Where does the right for information start and end? If suing the person who hacked and/or released the key can be explained by the law, how to avoid the public to get the information available on the net?