Home to millions of audio & video episodes from thousands of podcasts and media sites across the web,Odeo.com is part search engine, part media directory, and part social network. Users can search & explore media channels covering just about any topic or area of interest - from automotive to technology, comedy to cooking, education to entertainment.
Alvins blog explains the use of Everyzing. According to the author this is a service that scans through an assortment of podcasts and converts all speech into text that is searchable.
What you can do then is to can search for generic topics. Search results can be sorted by date or relevance. By clicking on a hit, you can listen to the audio in the built-in player.
This is a website of the External Spanish Radio. It is all in Spanish, and I think that I could use this website for my secondary students. It contains written and audio texts, which would accomodate two different learning styles at the same time (thinking DI teaching).
Oxford professor of synaptic pharmacology (?!) argues that facebook and social networking sites infantilizes the brain, leaving us with short attention spans, less empathy, and a "shaky sense of identity". Listen to the audio interview as well.