Migrating a Radio Station To Linux?

allikat_uk asks: "I'm a DJ for a net radio station (amongst other hobbies). I want to migrate from an XP platform running (SAM Broadcaster) to a Linux based solution. I don't need to host the server, as the station does that, I just need a nice GUI solution to stream the MP3 files to the server. I need to run 2 streams, 64k stereo, and 22k mono in MP3 to a shoutcast clone server. My current software has a nice MySQL database to make quickly finding the tracks I want easy, dual playback 'decks' and easy voiceovers. Is there a Linux equivalent available under GPL?"