TuneIn
//tunein.com/
TuneIn hosts a major radio, show and podcast directory. It also provides the RadioTime/AIR interface for listener feedback or something. ST2 queries the OPML lists only for radio stations currently.
Configuration
You can switch between "music" and "genres" list. The genres list is basically a longer and expanded variant of "music". Use Channel ▸ Reload category tree to update them thereafter.