Podcasts, i.e. digital media files (audio and video) distributed over the Internet, have become particularly popular since the introduction of podcasting in 2004. Podcasts are bringing changes to patterns of media production and consumption, and indeed to the way Internet users communicate. Many podcasts repurpose content, in some cases adding a play-on-demand dimension to broadcast media. But most podcast productions introduce original content on a myriad of subjects. The most widespread uses of podcasts, however, are within education, professional communication, and individual self-expression. Podcasts are normally dealt with in the context of established research disciplines such as media studies, social studies, and educational studies. Schools have yet to develop in the research on podcasts. But it is possible to identify a number of directions and issues within the disciplines where podcasts are having notable impacts.