Airtime looks like a fanstastic open source radio-broadcast automation server. It is browser based and seems to offer a complete feature set for radio programming and automation. I worked in radio long before the advent of mp3s and automation; so, from where I stand the best feature is its documentation.
Here's the homepage for the software at Sourcefabric: http://www.sourcefabric.org/en/airtime/
There are several pages of installation documentation intended for any level user/administrator. Here's the "automated" installation documentation: http://en.flossmanuals.net/airtime-en-2-0/automated-installation/
The patch seems ready for testing. Apply to TurnKey LAPP for ready to go Airtime instance. Devs set it up for username: admin and password: admin initially. This can be easily configured on first boot with an inithook using bash.
Documentation for using Airtime is available at its home.