Shortly following news of Apple’s stock options backdating scandal, the Associated Press is reporting that the company is now facing several lawsuits, including one alleging that Apple is monopolizing the digital music market.

The lawsuit is over Apple’s proprietary iPod and iTunes software, which is generally incompatible with non-Apple products. Media purchased on iTunes is supposed to be playable only on iPod hardware, and songs purchased on other DRM systems are not easily playable on iPods.

Apple motioned for the courts to dismiss the case, originally filed July 21, but the courts denied the motion on Dec. 20. The plaintiff seeks unspecified compensation.

Apple is also facing a lawsuit, filed on Nov. 7, over the supposed high failure rate of the logic board in the iBook G4. Another lawsuit filed by PhatRat Technology accuses Apple of patent infringement for its iPod-Nike product.

While the iPod reigns supreme in the music player market, Apple’s success has not come without a price. Last year, Creative Labs sued Apple over patent infringement of the iPod interface, which eventually lead to a countersuit. The companies eventually settled on having Apple pay Creative $100 million for use of the patented technology.

The popularity of the iPod has drawn attention from hackers discontent with the proprietary nature of the device. Jon Lech Johansen, who cracked DVD encryption, has undone Apple’s protection scheme and plans to license his work to companies interested in opening up interoperability between iPod/iTunes and non-Apple devices.