Legal Aspects of Podcasting

Three different attorneys -- one of them a podcaster -- weigh in on the growing importance of the legal aspects of podcasting, whether you're a hobbyist or doing this as a business and monetizing with sponsors (or somewhere in between).  What is the difference between a copyright, a trademark, and a patent, and which of these do you need to know about for which aspect(s) of your podcasting efforts?  What about expressing opinions on your podcast?  How about sponsor relationships?  Hear what Shawn Yesner, Chris Tanner, and Jamie Marcario say on these topics and more.  Then see http://bit.ly/FTCadvtg and http://bit.ly/FTCdisclo as alluded to by Marcario.