Over the summer several library databases that contain articles added audio download. So now you can listen to articles from magazines, journals and subject-specific encyclopedias on your iPod (and other mp3 players). Just look for the audio icon in the following resources.

Listen to articles from several dozen subject-specific encyclopedias and dictionaries in Gale Virtual Reference Library
Listen to arguments on both sides of the fence for major social issues in Opposing Viewpoints
Listen to author biographies, literary criticisms, and overviews of major works of literature in Literature Resource Center

Audio is also available in these Wilson databases:
Art Full-text
Applied Science Full-text
Education Full-text
General Science Full-text

and in several of the curriculum databases intended for the K-12 crowd.