"Larry King" and "Sarah Palin" discuss approval voting and compare it to plurality voting.

Steven Brams on approval voting: http://bigthink.com/ideas/18726

Approval voting nonprofit: http://www.approvalvoting.org/

Video comparing voting systems: http://www.teach12.com/ttcx/VotingFreeLecture.aspx

Voting systems in general: http://en.wikipedia.org/wiki/Single_winner_voting_systems

More on Voting systems at rangevoting.org: http://rangevoting.org/Approval.html