It's a good day for content providers (e.g., movie studios) in the Ninth Circuit. It's a bad day for anyone who likes to (illegally) download movies for free.
Here's a lengthy opinion by Judge Berzon explaining exactly how torrent sites -- e.g., isohunt.com -- work. As well as why many of them will be shut down in the near future.
Round 16 of 184 in the neverending battle over copyrights and content control.