Spotify

After a long crescendo of promises and speculation, Spotify has launched in the United States at last.
The music-streaming service allows users to stream what it says are "millions" of songs both from their computers and from mobile devices. Spotify relies heavily upon playlists, which users can create as soon as they boot up the service. Users can search through the company's tracks and simply drag and drop songs to a given list. The service also allows people to import MP3s to bolster the music player's offering. Once the playlists are created, they can be accessed from anywhere a user loads Spotify.
Spotify offers a free, ad-supported service for those who want to listen to tracks on their computers. Users can also sign up for the company's $4.99 per month unlimited plan, which allows them to stream "millions of tracks" with no time limits and no ads. The company's $9.99 per month premium plan includes all the same features, but adds the ability to listen without a Web connection and on mobile devices. Premium also boasts enhanced sound quality. [CNET]