podcasting (short intro on podcasting), you may be interested in a Podcasting Legal Guide "to provide general information about some of the more common legal questions that get asked in relation to podcasting." (“Podcasting Legal Guide http://wiki.creativecommons.org/Podcasting_Legal_Guide © 2006 Colette Vogele of Vogele & Associates, Mia Garlick of Creative Commons and Berkman Center Clinical Program in Cyberlaw. This Guide was produced as part of the Non-Residential Fellowship Program of the Center for Internet & Society at Stanford Law School.”)
It's available under the Creative Common’s Attribution-NonCommercial-ShareAlike 2.5 License (free for personal use, effectively). It only covers US law (copyright including using music, publicity rights, trademark law, and legal issues to do with the distribution of your podcast etc).
I've not read it all in detail yet but it looks very comprehensive, including links to resources on podcasting generally, and, judging by the authors and their organisations (Lawrence Lessig also wrote the foreword), it should be pretty authoritative. But I repeat, it only covers US law...
(Via Creative Commons blog)