Hey folks, it looks like we're going to have a quorum of core developers at Pycon 2012 in Santa Clara, so we will definitely be sprinting on Mailman 3. We'll be primarily working on the integration of the core engine with the official Django-based web ui. If you want to participate, kibbitz, or just learn more about MM3, I highly encourage you to join us.
Remember, the Pycon sprints are free and you do not need to register for the conference to attend. Please do sign up on this page if you're going to join us though, so we can plan sprint room sizes and such:
If you haven't been to a Pycon before though, I highly recommend it. There are tons of great speakers and presentations, some great tutorials before the conference starts, and always excellent BoFs and other events. Attendance is capped at 1500 though, so if you're thinking about it, JFDI already! :)