The streaming-music app mini-industry is interesting: I'm guessing at this point that if you use an app for music streaming, you might have found your winner already. Personally, I tend to use Slacker more than others. I've found the selection there pretty good, and the iPhone app has been challenging my music-filled iPod for listening to tunes in my car.
But I will admit that the interface for most of these music apps is lacking. It's basically a series of menus to let you look up the song you want. That's where Songza is trying to grab some users: Songza's interface is actually impressively simple and clean. And what I especially like is that if you don't have a particular song in mind to play, Songza will help you choose. Rather than going through a list of stations, the app asks what kind of mood you're
