I've decided to get with the times and have started an Audioscrobbler group: http://www.audioscrobbler.com/group/itsatrap
I know I'm resistant and a bit of a curmudgeon when it comes to embracing new trends online, but this thing actually seems pretty darn cool. Audioscrobbler is a media player plugin that tracks your listening habits, creates charts and helps you find new friends with similar tastes. It might seem like a marketer's fantasy, but so far it seems quite honest and straightforward. So yeah, join up and find out what your peers are listening to. It'll be fun, trust me.
This would also be a good time to remind everyone that mp3 ID tags are very, very important. If you aren't properly tagging your tracks, you are making a big mistake.