KaPingYee asks: How can we make online debates more productive?

He'll point out a few interesting projects he's seen in computer-supported argumentation, such as ReasonAble, TruthMapper, and Compendium, and show you a discussion mapping tool he hacked up a few months ago that he hasn't figured out what to do with yet.  Bring your own ideas; let us know what other argumentation tools you've heard about and what you think we need to come to better consensus, whether it's working in teams online or it's about building a nation of informed citizens.