Gallup has a new map up, rating each state by religiosity. Respondents answered whether religion is an important part of their lives, and the map reinforces some of the usual stereotypes about the religiosity of the Deep South and the lack of religiosity in the Northeast and Pacific Northwest.
However, I think the most important parallel is the religiosity map with the electoral map. Take a gander:
Religion and politics, still bedfellows.
(HT: Mark Silk)