Mainstream meter and historical reports

Include a mainstream meter like last.fm, where it measures how much percentage of your listening habits are mainstream and which artist you listen to is most mainstream and which is least. Include it on profile as well. Also a historical report feature where you could look at your past 4 weeks/6 months/1 year of the past, so you could compare your past stats and see how your music taste has evolved. Again, similar to last.fm feature.