For now, please see this nifty podcasting primer, that I'll actually use as a nifty link everytime someone writes to me and asks, "So what's podcasting?"
What is podcasting?
Podcasting definitions - Wikipedia
What is a podcast? - Podcast Alley
Interesting comments by Steve Jobs
Mr. Tapper also addresses the issue of podcasting guidelines, prompting Mr. Jobs to respond that Apple's attitude toward podcasting is "it's the Wild West" with a few guidelines against pornography and copyright infringement. Mr. Jobs also refuses to speculate about a possible video-capable iPod and deflects criticism that Apple is focusing on the iPod at the expense of the Mac by saying "our Macintosh computer sales are growing at three to four times the rate of the rest of the industry."
A First Pass at Podcasting Guidelines
Kirk's Seven Rules of Effective Podcasting
Guidelines and Apple - Wall Street Journal
Podcasting & Licensing
ASCAP Internet Music License
ASCAP Posts Podcasting Licensing Agreements for Music
Podcasting, Music, & the Law