I'm just getting started on Triberr- and so far the response has been awesome. It really has expanded my readership. I've probably gotten three times my usual number of hits since starting up.
That said, I'm starting my own tribe. Cause Bloggers. That is to say, blogs about issues, or that occasionally focus on issues... that sort of thing. No giveaway blogs, or coupon blogs. Just... real stuff. Anybody interested? You have to follow me on twitter (@bcmgsupermommy) and then I can send you invites.