I agree that we need to get rid of paper but I've got two problems with voting over the net.
1. Voter ID, How does the state know who's actually voting on the other end, and how do you secure that ID. Please don't say SSN.
2. Hacks, If the defense department and CIA can't stay ahead of a 14 yr old with a laptop, how can we expect states, with fewer resources than the feds, to stay secure? If a state's e-ballot system does get hacked we'll end up in a worse situation than we've got this year with no paper trail for proof.