iTunes Producer is the program that Apple created that allows music makers to upload their songs to the iTunes Music Store. Usually you need an iTunes Label Connect Login to get the program (i.e. Apple needs to approve you), but Macgeekery has found a way around that.
If you're running OS X server you can download the application (via the built in Software Update functionality), but of course you can't use it without an iTunes Label Connect login.
Pointless? Perhaps, but it is still pretty neat.