I love all of the DJ lists.
Like Kosmo said, sometimes it helps us to id songs we are trying to pinpoint. Also, it's a way for some of us to live vicariously for several nights when we can't attend various shows and DJ nights. It also helps to encourage a few of us to get out and patronize some of the other DJ nights around town. Our DJ friends are a wealth of musical information. It's yet another way of sharing in the love.
With Kosmo's lists, I always get a kick out of trying to figure out who he played what for. He does that sometimes, you know, be it a person or a particular group of people.