A cautionary tale. I've worshipped with Micah here in D.C. so I sawa little of what he described but I'm certainly no Quaker, and (happily) have since gone back to my old church. But the critical mass issue is one that Unitarian and Universalist Christians are going to have to grapple with, in part because we're probably too radioactive to attract ecumenical partners. Which is its own shame.
If Quakers don't have the strength or inclination to seed new congregations, perhaps it's time to partner with those who do.