Yeah I watched that trailer last night and it's fucking great. That's the best thing Eli Roth has ever done honestly (which isn't saying much considering it's the guy who did "Hostel" 'n all... but still, they should make that into a REAL movie.) That old, grainy style is exactly the kind of shit I miss. The narrator's voice is perfect too.
For those who don't wanna deal with it on IGN, here it is on Youtube:
http://www.youtube.com/watch?v=RApHZ-snSGc