I went to go see it last night. I'm a big Beastie Boys fan so it was a fun experience, but 80% of the movie was cut together from material shot by fans--completely handheld. It's hard to watch handheld video on a theatre screen.
When I was walking out of the theatre I found I had a renewed appreciation for the Steadicam. I was also wondering why the cameras they gave out didn't have better digital stabilization systems. Or, why couldn't they have done some post-processing stabilization? A lot of the shots they used were zoomed-in, they could have easily run the video through some post-processing software.
I'll definitely look it up when it comes out on DVD. This is a video you'll want to watch on your 13" TV, sitting at least 10 feet away. :-)