At WWDC 2013, Apple announced iTunes Radio. This free (ad-supported) Internet radio service features over 200 stations and can be accessed from your iPhone, iPad, iPod touch, Mac, PC, or Apple TV. Stations are inspired by the music you listen to as well as Apple-curated stations. The service will offer Siri integration, exclusive pre-release streams, and more. It will be available this fall.

Of note, iTunes Match users get iTunes Radio ad-free.