I highly recommend the new documentary video by Hyperborean, whose blog appears on my list of blogs and sites I follow. The documentary concerns organized protests at the DNC and RNC nominating conventions and has some extraordinary "footage" (an old film-term, I realize) of plainly excessive police-over-reaction, among other things, but you can judge that issue for yourself, of course.
A link:
http://aeconomics.blogspot.com/2008/10/our-documentary-is-done-watch-it-here.html
Well done, Joe.