Behind the scenes DVD is pretty informative and good for a single viewing, but it appears that Damon and Co. are most definately on crack/meth. They looked fucked up out of their skulls.
The exclusive area of Gorillaz.com is pretty interesting as well. There's a flash game that's surprisingly addictive and fun to play, as well as a couple of videos and screensavers as well.
By the way, here's a link to the 1080P version of the new music video for Stylo featuring Bruce Willis: