The WRNI app has been available now as a free download in the iTunes store for 2 weeks. So far, it has received very positive feedback - all 6 reviews in the iTunes store gave it 5 stars!
My favorite quote so far about the app comes from a Newspaper Association of America blog post: "Poised like a fragile little flower among heavily plowed fields is WRNI radio -- NPR from Rhode Island." The app was only mentioned in passing, and this sentence was the complete mention, but still, it was nice to get the mention.
As for usage, over the past 2 weeks the app has been downloaded about 5000 times - not bad for something specifically designed for a Rhode Island public radio audience.