In case you have missed it D A Carson has a book out that critiques the emerging church. Whilst I have many criticism of the emerging church, and consider myslef part of it, I found this book to be so poorly written I am amazed it was published. We need dialogue partners who will critique us, it's part of what the emerging church is about, imho. But this book seemed so ill informed.
Anyhow it critiques Brian McLaren amongst many other things. Brian has not written a response, but recommends a paper by Dr Stanley Mills. If you buy Carson;s book, you might want this paper to hand too, it's very helpful.