Audio Boo has taken advantage of the recording and internet capabilities of smartphones and created a service which publishes audio to the internet from a phone.
Airtime allows you to schedule audio files in a calendar timeline. It is designed with radio stations in mind, as a free software replacement for similar commercial scheduling tools. It has a scheduling calendar, smart playlists, archive management and a very stable output. You can also switch output to live streams coming in from remote DJs or journalists.