A few months ago, I had my students create a podcast, where they had to research and record a news story about a product recall for a program like NPR. This could have been a great tool for students to share their research with the world! In fact, one teacher I recently talked with told me that "when students know the rest of the world is watching (or in this case listening), they are more likely to step up their game."
Not a big fan of student recordings? You might want to check out the Audioboo channels for short audio recordings. I am a big fan of CNBC and found some great interviews on the Italian financial crisis. This is a great resource for any classroom!