This nine minute video produced by researchers at Princeton offers a compelling demonstration of how easy it is to hack the Diebold voting machines that are/were used throughout the country. Diebold has issued a rebuttal (see: http://newsblogs.chicagotribune.com/news_theswamp/2006/09/diebold_stands_.html). The site "Black Box Voting" is also pursuing the story (see: http://www.bbvforums.org/cgi-bin/forums/board-auth.cgi?file=/1954/36510.html).
I know that I voted on a Diebold machine in the last election. How about you?