RealNetworks fears legal action from Apple over Apple's anti-competative DRM system

This Silocon.com article by Jo Best includes:

RealNetworks has revealed its attempt to break the DRM that protects iTunes might not only mean a hit on its bottom line but could also land the company in court.

Real introduced its Harmony technology last year. It enabled consumers to buy iPod-compatible tracks from its online music shop. That involved breaking Apple's FairPlay DRM (digital rights management), which ensures that music bought from rival online music sellers won't play on the iPod.