?AmazonMP3????????iTunes???????–NPD??

Cnet Japan ??? http://japan.cnet.com/news/media/story/0,2000056023,20371519,00.htm ?Amazon.com?MP3?????????????Apple??iTunes??????????????????NPD team?????4?15????????????????? ?2???AmazonMP3???????????10?????Apple????????NPD???????? ??????????????????????????????iTunes???????????????????????????????????????NPD???????????????Russ Crupnick????????? ?Apple?iTunes????????????1?????????9????????AmazonMP3??????????????????????????Wal-Mart?2????????2???????NPD???????? ?????Apple???????

extra: persisted right here

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