In a recent blog post, Jon Johansen announced that he plans to release a tool that will be able to defeat the Advanced Access Content System (AACS) used by both Blu-ray and HD DVD.
Jon "DVD Jon" Johansen, who popularized the means to crack the CSS system protecting DVDs, has committed to launching a tool to crack the Advanced Access Content System (AACS) used in next-generation DVDs.

In a blog posting earlier this month, Johansen announced that he had registered the Deaacs.com site, which cites a "winter 2006/2007" release date for the software.

"AACS, like CSS, will be a success," Johansen wrote. "Not at preventing piracy. That's not the primary objective of any DRM system. Anyone who has read the CSS license agreement knows that the primary objective is to control the market for players. Don't you just love when your DVD player tells you 'This operation is prohibited' when you try to skip the intro?"
I can't imagine the movie industry is going to be happy with "DVD Jon" if he succeeds. If you'd like to read more, the entire article can be found here.