I noticed the absence of God and religion in the 2008 presidential debates, especially compared to the devoutness battle waged by Bush and Kerry in 2004, but this article sums up Godlessness from the McCain vs. Obama meetings. If you're interested at all in the intersection of religion and politics, it's worth the quick read.
Religion plays a major role in how many people make sense of their world, including their political world, but they got little if any guidance from the debates. Why? I suppose a lousy economy trumps religion, or at least trumps "moral values" type of issues. Which candidate this helps or hurts is hard to say.