Garry Wills has a great op-ed in the Times.
It's actually pretty close to my take on things so I won't preach. What I think is important is that Democrats don't run to religion on false pretenses as many of my atheist friends suggest. That's obvious to spot. Rather Democrats should engage the religious community and work with them to get real policy changes to happen. This means being in active discussions with them. Do we expect an evangelical leader to refuse to be part of a coalition to combat poverty? (Pat Robertson's excluded, though I'd use his support on the issue.)