It's all very well Apple announcing 100 million iPods sold since the first player hit the market in late 2001, but when you compare it to the mobile arena, where over 80 million smartphone devices with music and video capability were sold in the last tweleve months, you realise that while it might have the zeitgeist, the iPod is quite clearly no longer the top selling family of music devices.

2006 was the year of the converged device with 80 million smart phones shipped worldwide, according to analysts - and Nokia remains the unequivocal leader selling almost one in two smart mobiles.
Businessweek.com

Apple® today announced that the 100 millionth iPod® has been sold, making the iPod the fastest selling music player in history. The first iPod was sold five and a half years ago, in November 2001, and since then Apple has introduced more than 10 new iPod models, including five generations of iPod, two generations of iPod mini, two generations of iPod nano and two generations of iPod shuffle.
Apple Press Release