I can’t tell who’s in charge of The 500 Greatest Songs of All Time, but he or she is definitely dedicated. Since late October, a blogger named “Xadai” has been counting down his or her favorite music videos, beginning with one of my personal favorites, #500, Boston’s “More Than A Feeling.” Each song gets its own post, which includes original historical commentary and a YouTube embed. As of this afternoon Xadai is down to #401, which at this rate means we should see #1 sometime in early spring.