Scott McKnight, the self professed emerging theologian from North Park Theological Seminary in Chicago writes a good definition for the North American wing of the emerging church movement in Christianity Today. Click on the title of this blog to get there.
He outlines five streams of the movement. Prophetic/Provocative, Postmodern, Praxis Oriented, and Political. (Although, I must say that's a typical modern outline of this postmodern reconsideration of Christianity.) ;-)
I would have to say that I find myself in the Prophetic camp, and Provocative is most likely the better term, having been recently provoked by a nearly criminal element within institutional Chrstianity.
So take a read, and let me know if you fit into one of these definitions, and if so, which one.