Wow! I am amazed by this.
Some out-loud thinking; I wonder if you can apply this to news delivery in full. What I mean is, If I could submit a URL of the NYT business column and request that every morning, your app email me the mp3 file covering the whole column or just one article.
Essentially I can be listening to my morning paper on the go rather then reading it or needing a browser.
Very cool app! Nicely done