Zune replaces Sandisk as the second best selling digital music player
. It grabbed 9% of the unit sales, with a 13% of the dollar value due to its higher per-unit price. Some are calling this a successfull launch, but I think it's still too early to call: many of the early adopters would have bought the unit in that first week, so we may see a significant drop in sales in the following weeks.
One indicator of this is Amazon sales ranking: when Zune debuted it was in the top 10 best selling MP3 players
, although it has slipped to # 17 only days later. Of course, the fact that there is only one model of Zune is working against Microsoft, since Apple covers the gamut with Shuffle, Nano and full-sized iPod.