A Million Zunes Sold
According to Robbie Bach, Microsoft's president of the Entertainment and Devices Division, Zune has already met the goal of 1.000.000 players sold, set at launch for the end of June. He also confirms that new Zune things will come in this fall, talks (not) about the Zune Phone, the new Watermelon Red Zune, the Zune Marketplace and of course Xbox 360.
You're off by almost as much as the original poster.
1/100 = 1% not 0.1%
The only way to get down to 0.1% is if the iPod only had a 10% share of the overall MP3 player market. I'm pretty sure the iPod's market share is something like 60 or 70 percent.
soo..
100/.6 = ~166 million total MP3 players
1/166 = zune market share of 0.6%