Apparently, RealNetworks has reverse-engineered Apple’s FairPlay software. FairPlay is the name of Apple’s DRM (digital rights management) software. RealNetworks has been trying to get Apple to license their FairPlay software so that Real can sell iPod-ready music files from their online music store. Apple has consistently denied their requests.
My biggest issue is just wanting to play the music that I’ve purchased anywhere I want. Hymn is a very good DRE (digital rights enabler) for iTunes Music Store files.