Apple is putting streaming music on shuffle with iTunes Radio, a service announced today as the company’s annual WWDC developers conference. Set to launch later this year, iTunes Radio is similar in concept to Pandora, letting users pick a favorite artist and hear music from that act as well as songs from similar artists as determined by algorithms. The advertising-supported service – iTunes Match subscribers won’t get ads — will bow stateside in the fall with other territories coming online later. It will be built into iOS 7, Apple TV and on iTunes for computers and only will work on iTunes, iOS and Apple TV. More than 200 stations will be preloaded in iTunes Radio, but users will be able to create new channels, rate songs and buy music from iTunes Store. For all of its innovations, Apple is something of a Johnny come lately to streaming music, a field crowded with such players as Pandora, Rdio, Spotify and Google’s All Access, which was unveiled last month.