I'd like to suggest adding a daily world ranking showing the best plays of the day for each song, I think it would be a great motivation for new players, it's always good to see your name on a leaderboad even if it's just a daily one. I know this would most likely be useless for some underplayed songs, but might be cool in the most popular ones.
Edit: Figured daily would be a bit too much after posting, pheraps weekly or monthly?
Edit: Figured daily would be a bit too much after posting, pheraps weekly or monthly?