In June 2014, we started a weekly discussion on Maven development: it happens every Thursday at 8PM UTC, done with Google Hangout and recorded.
Here is the recordings list, with some ideas written down:
2014-07-24 recorded event, summary on ML
In the same spirit, other events about development around Maven may be organized with other tools, schedules, people: don't hesitate to give pointers for us to add to this list.
See Meetups