Institute for the Study of Secularism in Society and Culture (ISSSC) could prove to be quite an important resource. The institute has issued some interesting publications, and several texts can be found online.
I mentioned David Hollinger's essay in a previous entry. For an introduction to the symposium see:
A NEW ACADEMIC ENTERPRISE
By Barry A. Kosmin and Ariela Keysar.
One important publication is Secularism & Secularity: Contemporary International Perspectives. See the Introduction online.