What God Has Joined: Divorce and Remarriage in the Bible

See the controversial Christianity Today article by Dr. David Instone-Brewer, the response by Dr. John Piper, and Dr. Kostenberger's response to both of them. Your thoughts?

UPDATE: Here is Dr. Kostenberger's response to the comments and questions of his readers.

UPDATE #2: Dr. David Instone-Brewer responds to Dr. Kostenberger here.

HT: Justin Taylor