Here's some interesting reading about the voting machines being used. ES&S and Diebold seem to be the real problem machines and if you'll read the report you'll see why. Seems they have these backdoors that can be accessed remotely and the shady characters involved who own and run their operations. Hell no wonder we can't get an honest vote. Just thought you might like this being the diehard researcher you are..;)
http://www.thelandesreport.com/votingmachinecompanies.htm