try shoutcast (http://www.shoutcast.com) many online radios come from this on irc networks... gamesnet for one
you could just http://www.gtagaming.com/mods/tools the ADF Converter
where you can make your own radio statios... or edit ones. mta can make a radio station with good music (metal) and have comercials and what not... possibly for the multiplicty team... dunno