Streaming music is really impressive on the iPhone. For example, I've been using my Pandora app for workouts almost exclusively. I'm also a big fan of Hype Machine, a site that takes the best free MP3s from around the Internet's best music blogs and puts them all together in one place for your listening enjoyment.
And now, you can stream all of that music straight from your iPhone with Hype Machine's new radio app. You can choose from great music blogs, like Stereogum and Gorilla vs. Bear, or just let the app mix new music for you so that you can discover what's out there.