> #1 Peer pressure Things like vote.org will help if they close the loop by showing to your peers (bragging rights) that you've voted.

Yeah, I defs remember remember reading about a group that sent out a list of everyone in your neighborhood who voted in past elections with an add-on like, "Make sure you're on this list next year", and they got a whole lot of people registered. I also heard Facebook's "I voted" status-maker increased turnout last time around