There is an excellent ongoing debate on this book at Free Church of Scotland ( Free Church Of Scotland website ). Take note of "Today's Issues" on the home page ang go to the Message Board. You will find a chapter by chapter critique of TGD which has just reached chapter 3 and there are various threads associated - "Dawkin's Delusion" being the first.
Have you looked at any of cdavis' postings? He joined the forum from Dawkins own website forums and appears to be putting in a good effort on the atheist front.