http://blackboxvoting.org/ - (As I recall they had a video documentary in 2000, maybe it's still online)
There are also videos online showing how to hack
Sequoia voting machines,
RFID ePassport readers (read the hacker's
blog about it or the
ARStechnica story), and lots of other 'Trust Us, it's Secure... but closed source so you can't check... just Trust Us™' technology.
