Apparently, podcasting is growing:
According to FeedBurner, the number of podcast and videocast feeds managed by the Chicago-based broadcast aggregator grew from 1,671 in January 2005 to 53,571 in May 2006 — exceeding the number of radio stations in the world.
In the same timeframe, subscribers to FeedBurner-managed podcasts and videocasts grew from 21,491 to almost 3.2 [...]

PodTech gained a high profile employee over the weekend, as Microsoft’s lead blogger, Robert Scoble, stepped down to begin a new career in podcasting.
Robert explains that the move was more for family reasons than anything else and that Microsoft is a great company that tried their best to retain him, but the jump in focus [...]

If you are looking to begin podcasting, you’ll first have to decide your topic for concentration.  If you have an existing business, you can easier narrow down your niche.  However, even someone with an existing podcast will need to decide how tightly they want to concentrate in a specific area.
A ‘marketing’ podcast will not do [...]

Your podcast is full of great content and is useful and topical for your niche.  It brings you business and it encourages people to stay on your site longer.
However, have you considered the audience beyond your own site?  There are several ways to reach that audience.  Podcast Directories are a highly popular way to grow [...]