Currently , songs purchased from Apple’s online iTunes Music Store can’t be played on portable devices made by other companies. Songs purchased from many other online music stores won’t work on iPods because they similarly use a form of copy-protection that Apple doesn’t support.
Johansen said he has developed a way to get around those restrictions. But unlike with his previous work, which he usually posts for free, the Norway native plans to capitalize on his efforts through his Redwood Shores-based DoubleTwist Ventures, said the company’s only other employee, managing director Monique Farantzos.
SeattleP-I has a more detailed APWire report: Hacker says he’s cracked iTunes, iPod restrictions – pdf