http://consumerist.com/2008/09/17/update-heres-how-you-can/

Update: Here’s how you can exchange your PlaysForSure code for an iTunes redemption code. Movie fans over at forum.blu-ray.com say Warner Bros’ new release of “Speed Racer” promises a digital copy of the movie that will work on iPods, but there’s no such thing on the disc—only protected WMV files. [blu-ray.com] (Thanks to Sabler!)