Prefaced by a foreward that's written by Lawrence Lessig, a Podcasting Legal Guide was made available by Creative Commons, Vogele & Associates, and the Berkman Center for Internet and Society at Harvard's Law School. The guide which was apparently inspired by the Electronic Frontier Foundation's Legal Guide for Bloggers covers some of the typical gotchas that could result in legal trouble for podcasters. Especially ones that remix third party content into their own productions. Says the guide (which is available via the Creative Commons Web site):
When creating your own podcast, it is important to make sure all necessary rights and permissions are secured for the material included in your podcasts. This is relatively easy if you create all of the material that is included in your podcast but can become progressively more complex the more you include material created by other people. If you do not obtain the necessary rights and permissions, you may get into legal trouble for incorporating third party material into your podcast and for also authorizing others to use that material as part of your podcast.....The main legal issues that you will likely face that are unique to podcasters are related to copyright, publicity rights and trademark issues.