Nokia has published a optimized version of “TuneIn Radio” app for their Lumia Windows Phone devices over Marketplace.
“This version of application is exclusively for Nokia Windows Phone devices, offers over 50,000 stations and 1.2 million on-demand streams for you to choose from. The app is now available free at Marketplace “
Play your stations in the background while you use other apps
Pin stations to your start screen for one-tap listening
Add the stations, songs and shows you love most to your presets