Nielsen SoundScan, which tracks retail music sales and is the source of Billboard's top music charts, will make data available Wednesday on music downloads sold at several digital-tunes services. These include Apple Computer's iTunes, Roxio's Pressplay, MusicNet, Liquid Audio and Listen.com. It also plans to track sales from the upcoming Napster service.
Read more: [URL=http://news.com.com/2100-1027_3-1023140.html?tag=lh]CNet News[/URL].
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