I found a group in Milwaukee that has weekly practice sessions for "nonviolent communication", which seems very similar to what Derek was advocating at his "bad-ass double loop learning" talk. Thought some of you might be interested. I've gone to two gatherings so far. Definitely seems valuable, and very agile compatible.
You can follow the facebook group to find when meetings will be (generally every Wednesday evening near the Humboldt Alterra), or to ask any questions you may have: