[Yesterday, I spent an hour on the phone with Joe Green, co-founder of Project Agape, a still-partially-in-stealth start-up that is developing political social networking tools and platforms. It launched with a major new application built for Facebook Platform, called Causes. In the interview, Green talks about what he learned from his first experiment in building an online social network tuned around politics (See my March 2006 PdF article "Essembly.com: Finally, a Friendster for Politics"), his theories of online organizing, new features that Causes is going to roll out, tools Project Agape is building for MySpace and elsewhere, how to deal with privacy concerns, and how Causes differs from Change.org.]