You can find out here using ‘audioscrobbler’. Audioscrobbler “builds a profile of your musical taste using a plugin for your media player. Plugins send the name of every song you play to the Audioscrobbler server, which updates your musical profile with the new song.” I’ve installed the plugins for both itunes and slimserver so pretty much everything I listen to will get logged to the server. Time to get “Star Trekkin’” by the Firm ripped from 7″ to MP3 and into the audioscrobbler charts.