Are there meetings & other resources?

There is no organized, public meeting that I know of.

What people do is form informal peer groups to discuss the Proactive Twelve Steps.

You too may want to talk to people who might be interested in joining you informally for discussing these steps. See: How to share this process with a friend or a group.

For suggestions on how to proceed with the discussion, see: How to work the 12 steps online workbook.

For people who are in recovery, the following resources are helpful in finding kindred spirits:
AA Agnostica
AA Beyond Belief