If you are looking for simple to set up automation system for your internet radio station you should definitely evaluate Nextkast as an option. Written by a USA based developer for use on his own internet station, this software uses a simple method of importing music into categories, and then creating a rotation/clock that runs automatically.
Tutorial videos are available on http://www.nextkast.com
to help you get started.
The software includes the ability to schedule rotations or playlists and has a built in sound processor that sets auto gain and compression for a professional sounding station. Nextkast also has built in encoders, so no need to run other encoder software to get your station on the air.
Check out more and download your demo copy at http://www.nextkast.com