the musical peeping tom
check it: www.audioscrobbler.com. this new-fangled plug-in builds a profile of your musical taste for all the world to see. it automatically updates your profile every time you play a new song in itunes, winamp, etc.). here's mine. so if you're a stats guy (like me), you can get a sense of where the heavy rotation is.
but it doesn't stop there. you can also peer into bands and affinity groups, facebook-style. so you can do a little bit of six-degrees-of-separation action to find out about brand new artists.
so go download it. and then try not to play that lindsay lohan/hillary duff mix you like to sing along with in the car. you're cooler than that, right?