Another WWDC, another breathtaking array of new offering Cupertino. One of the big reveals was iCloud, Apple's upcoming cloud-based storage service. iCloud will let you more conveniently access your music from any of your devices, whether they're iOS, Mac or even PC. Music you've purchased from iTunes in the past will automatically be available to you online, but by default, your other music won't be. If you want it to be, you're going to need to subscribe to iTunes Match. This is a service that scans your iTunes library, and makes your non-iTunes-store songs available to you everywhere. The cost of sweet portability? $24.99 a year.