When I was in high school and college, I had a short/medium wave radio that completely enthralled me. Being able to listen to music and news from all over the world (depending on the weather) was absolutely mindblowing to me. The TuneIn Radio app ($1.99) gives me that exact same feeling. It's AMAZING. Want to listen to pop from Antarctica? Go for it. Almost every BBC local and national station? It's there. Want to record a show to listen to later? Just hit the Record button. I can't tell you how much I love this app.
If you love radio, check it out. It even works in thunderstorms. :)