Audioscrobbler

For those interested in sharing the tracks they've been playing on their favorite media player with the rest of the world, Audioscrobbler is the perfect site. Simply download an appropriate plug-in (iTunes and WMP plug-ins included), set-up an account and voila!, your media player will automatically submit your playlist information to Audioscrobbler, where unique stats will be compiled on your own personal page. Share your specific URL with others so they can keep up to date on exactly what Joe-Music-Listener is spinning.