At Macworld Apple announced that going forward songs sold through the iTunes store would be DRM-free. They also announced that you could upgrade your existing iTunes store purchases to the DRM-free (also higher sound quality) for $0.30 per song. The hitch though is that you had to upgrade all of your songs. Depending on how many songs you've bought, this could add up to a lot of money.

The good news is that Apple is backing off the all-or-nothing requirement on the DRM upgrades and they are now letting you buy individual songs or albums so you can pick and choose which stuff you want to upgrade.

There's a page in the iTunes store you can go to that lists all of your songs that can be upgraded. You can get there with this link (http://my.itunes.apple.com/WebObjects/MZPersonalizer.woa/wa/upgradeMyLibraryPage) which will open in iTunes not a browser... or you can go the iTunes music store in iTunes and click on the Upgrade to iTunes Plus link in the Quick Links section (upper right part of the page). This page in the iTunes store lists all of your music that can be upgraded. You can choose to upgrade all of it. Or select the songs and albums you want to upgrade to be DRM-free and higher quality.