I took some time to study what is happening on FUUSE.com the online media community of youth and young adults (Unitarian Universalists). There is a rich resource of writings, commentary and announcements here stretching back several years now.
However I noted with some wonder that there seems to be little traffic of late. There are no new articles, comments, posts in the last 48 hours, although there are several journal entries. Perhaps more folks are going over to UUCYF.org the Church of the Younger Fellowship (which is approaching 500 members)? Perhaps this is just a summer anomaly? Perhaps there is some ceiling to the number of active participants in an online community?
On a related note: At the Youth Ministry Summit in Boston last week, online services and community building were identify as a priority.