http://downloads.ign.com/objects/605/605438.html
Haven't actually downloaded yet myself but everyone's saying they're jizzing their pants over it, including the women. IGN says it's a movie but the file they're hosting is an EXE which leads me to believe that it may be a rolling demo that could perhaps be used for benchmarking purposes (something that was supposed to be released to the media on the 30th).
Anyway, take a look, I've just started DL'ing it.