The Associated Press looks at the exit polls, and finds that the reports we've been seeing for months about frustrated Christian conservative "values voters" ended up having an impact:

Those early exit polls also showed that three in four voters said corruption was very important to their vote, and they tended to vote Democratic. In a sign of a dispirited GOP base, most white evangelicals said corruption was very important to their vote - and almost a third of them turned to the Democrats.

The conventional wisdom - echoed here at Facing South - was that disenchantment among the religious right would depress voter turnout among this key Republican constituency, but not necessarily cause them to vote Democratic. The fact that many apparently did shows the depth of frustration among these voters.