That would only work if the person listens to all of his/her music on the computer. I listen to about 10 hours of music each day on my Nano, so that's where my top 25 most played in the last [insert timeframe here] is.
...10 Hours? 😱 What do you do in those ten hours? I listen to maybe 15-25 songs on my ipod a day, which is like what; 1-2 hours tops?
BTW, LOVE your Nature gallery 🙂

