I have tried many streaming radio apps for quite some time, Tunein is by far the best... besides the thousands of stations available (most of countries), the paid version which is only .99 can also record you favorites tunes for later enjoyment... you can also save your preset in different devices (including your PC)... it's worth the dollar...
http://tunein.com/
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With the new update on May 2014, unfortunately this is not my favorite app anymore...hope the builder see all the negative feedback and get this back to what it was before.