You can watch the film (for free) at Hulu, but you won't get the DVD extras - which you should because they are awesome.
Product Description from Amazon: "The salacious and uproarious American Grindhouse explores the hidden history of the exploitation film, those popular purveyors of cheap sex and violence. It emerged from the tents of carnie sideshows into features like Freaks, and mutated from there to change with the times. There were the rebellious teen flicks of the Eisenhower 50s, bloody gore-fests and drug movies of the turbulent 60s, and the Blaxploitation boom in the 70s. American Grindhouse takes a fascinating look at the films, filmmakers, shysters, and hustlers who made it all happen. Narrated by Academy Award nominee Robert Forster (Jackie Brown), with exclusive interviews with filmmakers, actors and critics Herschell Gordon Lewis, Joe Dante, Larry Cohen, John Landis, Fred Williamson, Kim Morgan and many more. Featuring over 200 clips from some of the most outrageous movies ever made, American Grindhouse is the most comprehensive documentary ever made on these masterpieces of the lowbrow. DVD exclusive special feature: Feel The Grind: The Making of American Grindhouse, Vintage radio spots, Photo galleries, Extended interviews... and much more!"
You can pre-order the DVD now!