On a certain day each month (say, every second Thursday at 8 pm MST), a single Association member hosts a google+ hangout. Other Association member join for a 60-120 minute discussion.
The time of day could be altered every so often to accommodate members in diverse time zones.
The tone can be informal; Association members seldom lack topics to discuss. David.firstname.lastname@example.org and email@example.com for Q's.