iTunes 7 feature – Backup to Disc

Yesterday, Apple released an onslaught of new iPods along with movie downloads and the new iTunes 7. After messing around with it for a bit, I found a new feature that is much appreciated.
Backup to Disc. This feature can back your entire library onto CD/DVD and also do incremental backup from there after. It can also be used for only iTunes store purchases.
Why is this useful? Before this, you had to have an extra drive or something else to duplicate the files. While we already had a backup working on iTunes, it never hurts to add a bit of extra protection to your music collection.