Halo 3 beta via Crackdown will be downloadable content???

According to a screen shot posted over at Destructoid, the Halo 3 beta via Crackdown will be downloadable content. I would imagine that the Crackdown game disc would need to be inserted to be able to access the beta once it's downloaded, but that's just speculation at this point. If you've failed at the two earlier attempts, this will probably be your last chance to catch an early glimpse of the most anticipated game of all time.