Finally, after years of waiting, Americans will be treated to one of the best music services on the planet. Spotify is set to launch in the US tomorrow. The initial launch will be by “invitation and subscription.” Not sure if that means there won’t be a free US service like there is in Europe or not. Either way, Spotify is the best alternative to iTunes available and the US launch has been highly anticipated for about two years now. Spotify’s service allows users to discover and stream new music anywhere.