Cool idea. One thing the author might like: if you sign up to lastfm, it tracks all of your music plays. So you can go through the data and see what you were listening yo each month/week
I recently stumbled across my lastfm login from late middle and early high school days. Talk about a blast from the past. This is a good idea, to keep the history going.
Last.fm is great! I do like the breakdowns you can do there, especially the query for the top songs/artists of the last 30 days, year & all time.
It's not as seamless to jump in and listen to stuff on lastfm though.