Stitcher, the radio service often referred to as "Pandora for news radio," has created an Election Center for the 2012 campaigns. It serves as a hub for news from sources like Slate, CBS News and others.
Plus, TechCrunch reports Stitcher is "also using the Election Center to test out some new technology. Every piece of content is automatically transcribed and analyzed, then used to create a list of trending topics across all of Stitcher’s election content. So you can see what the current hot topics are, look at how many times they’ve been mentioned, and then dive into a specific piece of related content."
You can find TechCrunch's coverage here.