Grooveshark is great (though it occasionally is missing music). But it's only a matter of time before it is shut down.
While I hope your second sentence is false, my wife has that program up playing in our condo about 1/3 of the time.
Grooveshark is good, I switched to it here in China. Outside of China on fast internet, I can usually find a playlist of what I want to listen to on Youtube, so I just do that. For Europeans, Spotify is far and away the best music service I've ever used, but it's not available outside of Europe yet.