Podcasting has become a household phrase, with more than 39 million Americans listening to podcasts monthly, and that number is growing rapidly. Two years ago there were 1 billion podcast subscriptions to 250,000 shows. The potential for audience growth is huge, and the advertising payout can be even bigger. CPM for podcasts is 20 times higher than for web and radio, and 4 times that of TV. And the best part about podcasting is nearly anyone with access to a Mac and some software knowledge can make on. All things considered, podcasting can really pay off.