The Thinking Minority

So I was reading some things on MoveOn (see the link on the left), and I don't understand the big controversy over computerized and paper ballots. There is a very, very simple solution: We vote on a machine, it prints out a sheet saying who we voted for (just the names we voted FOR, it doesn't list everyone, so there's no question) - then we double-check the paper receipt, save our vote on the machine, and put the paper printout in a box. The machines count the electronic votes and report the winner, and as a check the paper votes are also counted. No hacking, no rigging, no hanging chads. Why is this so hard? The perfect system uses both computers and paper - for speed, convenience, security, and accuracy. This is not difficult to figure out.