Ninja Mountain is a collective of Sci-Fi / Fantasy / Horror illustrators. They regularly make a podcast appropriately called Ninja Mountain Podcast. I found out about the podcast last summer and I started listening to a few episodes a day as I worked on art projects. They are jam packed with fun and interesting conversations about the art world, they talk a lot about the business involved with being a freelance artist, and they are more than happy to answer any questions from their audience and from time to time they have special guests like art directors and other awesome artists.
Ninja Mountain has been a great influence on me because they really opened my eyes up to exactly how the illustration world works, and they kept me company during my long days working. There are currently 107 episodes, most are around an hour and a half (sometimes more) so if you're looking for something fun and inspirational to listen to while you work, here's another one to add to your list!
You can find all of the episodes on the Ninja Mountain Scrolls Blog, and you can subscribe to the podcast on itunes HERE.