After a month of speculation, Twitter has finally launched a full-fledged app for the iPhone and web dedicated to music discovery.
Popular streaming music service Spotify has launched its first real advertising campaign. There's also a dubious report floating around that it will try to compete with Netflix with its own streaming video offering.
Popular online radio service Pandora has launched a Windows Phone 8 app, with the added bonus of hearing no advertisements with songs through the end of the year.
Apple has made the decision to delay its upcoming streaming radio service over royalty payment disagreements, according to reports by the New York Post and the New York Times.