I'm a huge fan of podcasts. I think the first podcast I ever subscribed to was Leo Laporte's "This Week in Tech" back in 2007. He's still on my favorite's list.
Podcasts have come a long way over the past decade. Podcasting studios with high quality equipment can be set up for a fraction of what it used to cost. Software is free (Audacity), and hosting accounts are affordable.
It is a no-brainer if you're looking for an additional way to promote your brand.
I listen to my shows through the Stitcher network of podcasts. I think you can tell a lot about a person through their podcast playlist. Here's my current list:
I actually have a dozen additional shows, but they rarely get a listen, and I just don't have the heart to delete them yet.
By the way, if you doubt there's money to be made in podcasting, Leo's network of podcasts pull in $4-million/year (source). Leo has been doing this for years, mind you, and he has a weekly national radio show that gives TWiT some solid street cred.
If you're thinking about hosting your own podcast, my advice would be to consider it more brand support than financial support. It's a way to call attention to your website or product. You'll find ways to generate revenue directly from the podcast as you build an audience, but that will take a while. Be patient and have fun.
If you're new to podcasting, there are great (free) resources all over the web. Cliff's site has free tutorials here. His podcast is also a great resource.
If you start a podcast, let me know! I'd love to give it a listen.