Internet iTunes Registry

The Internet iTunes Registry is a place for you to upload your iTunes XML index and then run a growing number of analytical tools on it. For instance, you can compare your index to other users, browse by letter, or see how diverse your collection is. An informational report is stored in a note that's then saved in your iPod's notes folder.

While not that many people have submitted their iTunes XML files, wouldn't it be interesting if a very large number of iTunes users started to upload their data? With a large pool of data, you'd be able to generate some interesting statistics on which songs, artists, or genres are most popular, or how songs are being rated based across a large user base.