With much speculation around the likely launch date of the new MySpace Music service, we’ve now got confirmation from the horse’s mouth, so to speak. CEO Chris DeWolfe says the new joint venture will launch in September, despite having only signed up three of the four major labels. The store will offer downloads and free unlimited streaming of tracks, funded by advertising. He also claims that some “eight-figure” advertising deals are already being negotiated. MySpace is also yet to announce the CEO of its new venture.