Statement from 20th Century Fox regarding the online leak of X-Men Origins: Wolverine:
Last night, a stolen, incomplete and early version of X-Men Origins: Wolverine was posted illegally on websites. It was without many effects and had missing scenes and temporary sound and music. We immediately contacted the appropriate legal authorities and had it removed. We forensically mark our content so we can identify sources that make it available or download it. The source of the initial leak and any subsequent postings will be prosecuted to the fullest extent of the law -- the courts have handed down significant criminal sentences for such acts. The FBI and MPAA are also actively investigating the crime. We are encouraged by the support of fansites condemning piracy and this illegal posting and pointing out that such theft undermines the enormous efforts of the filmmakers and actors and, above all, hurts fans of the film.
"We immediately contacted the appropriate legal authorities and had it removed."

the thing is all over, and has probably been downloaded 100K+ times already by now.
But that could actually be a good thing for the movie, maybe even excellent.
Lots of publicity, lots of hype, and the interest in that workprint shows that the movie will likely do
very well in the cinemas.
Fox will not lose a single customer because of this, it's an unfinished workprint, noone will watch that file
instead of going to the cinema but meanwhile the film gets a lot of free press...