There still continues to be plenty of discussion about the Manhattan Declaration. To point out some of the better discussion:
David Doran continues to jot down small snippets of thoughts at his blog:
Pyromaniacs had some further thoughts:
If you want an interview from an antagonistic perspective, check here.
Christianity Today has written a short article on it.
Finally, Ligon Duncan, in a gentle manner, answers what it means for the ACE (who had some in their council sign it and some not) here.