It's on the blogroll, but everyone interested in American religious history should find the syllabi in American religious history posted from H-AMREL to be of use. Also, a shout out to Randall Stephens and the Journal of Southern Religion, a pioneering and perservering online journal. I posted my own personal reflections on writing Freedom's Coming there a while back. The current issue has an excellent critique by Charles Reagan Wilson of the film Searching for the Wrong-Eyed Jesus.
Religion by region lives! Here's a great series of map summaries of U.S. religious expression ca. 2000, from the Glenmary Research Center. Nancy Ammerman has a good full review of the Religion by Region books (eight in all; I contributed to one), including the strengths and weaknesses of using datasets such as the Glenmary and American Religious Identification Surveys. Statistics tell some, but not all.