Here in Fairfax, Virginia, where I worked as an election officer, we had some older touch-screen machines (most of which failed at some point during the day) and a new paper-based fill-in-the-bubble ballot that used a scanner that was virtually invisible; as you slid the ballot into the box, a computer built into the lid of the ballot box scanned it. Very slick; the precinct gets an instant count, the ballots are re-countable, and voting can go on even if the computer bit fails. Plus, since people didn't have to have a computer in front of them to work on (or stare dumbly at) a ballot, many more people could vote at the same time.