I’m a big proponent of movie studios releasing the first 10-15 minutes of movies for free on the web. It’s perfect for movies like Speed Racer where I’m on the fence about whether I want to see it or not. Sometimes the trailer just isn’t enough to give you a good idea of the film.
As for the movie, despite the obvious green screen/Saturday morning cartoon feel, the F-Zero-like racing sequences seem fun enough that I would watch it.