Billboard is the latest to report on Apple’s digital music service, today posting an article that further describes the service. According to Billboard, the service is an “a la carte” download store that is built into iTunes. No subscription will be required for the service, and tracks will retail for an average of 99 cents. Once purchased, songs are automatically transferred to your iTunes library and synched to an iPod (if available). The content can also be burned to CD. Read more here, here and here.