See the "Listen Now" button that's at the top of every post? It's Odiogo. I just installed the widget. The company uses the RSS feed to convert a text post into an MP3 so that you can listen to blog posts.
I saw this feature today on The Junk Drawer and installed it right away. (I like to jump right in sometimes and recklessly try new widgets.) Kathy wrote a hilarious introductory post titled Meet Phil that you have to go listen to.
I have to confess that when I just sampled my own post, it came across as far more dry than when I read it in my head. Not sure if I'm going to like that. Anyway. Check it out.