Shouldn't finding radio stations online be easier? Based on the Adobe AIR runtime, Antenna tries to alleviate that. Using a vast list of stations combined with a map interface, you can discover, listen to, and switch between thousands of stations effortlessly. Search is possible by country or genre, or just by clicking on a location on the map. Beyond that you have a history of recently-listened stations and can even rate the ones you like and return to them easily later.
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To install, first grab Adobe AIR, then download the Antenna installer file. If you still have issues installing, let me know in the comments.
Changes in Version 1.5 (November 17, 2011):