Been working on a website for a network of meetup groups promoting effective altruism/optimal philanthropy. Still needs a little bit of polish but we're looking for feedback (you can check it out at www.thehighimpactnetwork.org). (We'll be doing an official announcement soon)

Also recently started a meetup group for a rational humanist open mic, where people can share performance art relating to ideas we tend to care about, which had a pretty successful first meeting. (Around 19 people)