CDJ'er was a site that I launched back in 2010 to help DJs (like myself, at the time) print track lists for their CD booklets from iTunes playlists. — Each CD typically contained about 10 songs, and previously, making a list for each disc was pretty time consuming.
Nowadays, I don't really DJ anymore… and most DJs have also moved to using USB memory sticks with their Pioneer CDJ decks, and the like.
So, 2012 is probably a good time to retire this service. So long, CDJ'er! 🙂