New books worth mentioning
Michael Bird of Euangelion has a new book coming out called The Saving Righteousness of God: Studies on Paul, Justification and the New Perspective (Carlisle, UK: Paternoster, 2007). Looking at the endorsements from all camps, it seems to be a very interesting read, especially for those who are so confused about what NPP (and its criticisms) is all about.
Also, as mentioned before, Gordon Fee's Pauline Christology: An Exegetical-Theological Study is out as well (sample chapter here). A must-read!