Mr. Greenway from Home Theater Blog has an interesting article about AACS.

AACS is the thing that comes after HDCP, which was the thing that came after the stuff on the DVD. I’m talking copy protection systems, of course. The DVD was cracked, HDCP is compromised, and surely AACS will follow, according to Mr. Greenway. (You gotta like the guy - he has Linn speakers. Disclaimer: so do I.) And Mr. Greenway points out there’s one sure way of making sure people buy movies instead of stealing them: make them affordable.

AACS is quite restricting to say the least. See the DVD-Recordable article below.

Link: Home Theater Blog - HDCP already irrelevant, AACS next
Link: DVD-Recordable.org - Strong Protection for High Definition Content
Link: DVDFile - The Supreme Court Speaks