Many of the touted advantages of electronic voting can still be achieved with paper ballots if you use a computerized ballot marking scheme.
I think that, you know, looking at all the systems that I've been studying over the last several years, that paper ballots with a precinct optical scan counters and random audits is the best system that we can have.
The basic idea behind a paper trail is that you take one of these electronic systems and you augment it with a printer that prints out people's vote as they vote.