It's with great disappointment that I must remove my recommendation for Appendipity themes for WordPress.
But I'm pleased to tell you about a new theme developer I think deserves your attention!
SecondLine Themes is a new company specializing in podcasting-focused themes. Their themes are affordable, integrate with PowerPress, and boast clean and modern designs.
Plus, you don't have to purchase a base framework in order to use SecondLine Themes!