
Microsoft expects wireless song sharing to be the feature on its Zune portable music player that allows it to challenge Apple's iPod, the company's chief executive said Monday. On Tuesday, the world's largest software maker will start selling the 30-gigabyte Zune, which allows users to <A HREF="http://www.eweek.com/article2/0,1895,2058512,00.asp?kc=EWNAVEMNL111406EOAD">beam photos and songs</A> to one another, and it will launch an iTunes competitor called the Zune Marketplace in the United States. In a telephone interview with Reuters, Microsoft CEO Steve Ballmer said he sees the wireless technology leveling out some of Apple's huge early-mover advantage, because the iPod does not offer that feature yet.