The "podcasting" part isn't about the design, it's about the Radioblog MP3 player being built into the template:
All templates from Blogger Templates allows you to easily play music or podcasts directly on your blog. Just make a link to a mp3 file Link and a little mp3 player will be automatically added:I believe that the Radioblog player is free, so if you have some technical savvy you may want to just insert the thing yourself. If not, however, these templates might provide a cool little addition to your Blogger site.
