The free music streaming and recommendation service, Songza, has just secured $3.82 million in funding. Its funding was revealed in a recent SEC filing. Songza offers playlists created by "music experts". The playlists are configured based on the date, the time of day, your mood, and the type of activity that you're currently doing. Like other music streaming services, you can thumbs up or thumbs down a song to better adjust your playlists.