Reasons Why People Buy iPod?

I have not seen much advertisements for iPod...at least here in the area where I live.
Then Why is it that its selling like hot cakes? And you know wat - I am thinking of buying one.... I was on that side of the group which believed iPod was just another fancy electronic good, it sleek design, clarity of sound and brand apart. But still I thought the music from my PCs speaker or head phone was more than enough. But still I am forced to change my thoughts of late. Reason the one and a half hour travel I am now making to reach my office.All the people I see around have ear phones plugged to their ears. One, it helps to pass the one and half hours, two - music is good for us(?!), three - it helps shut off the noise from the traffic around you. And it can double up as a pen drive - helping me to carry data with me. Should I buy or not?......I wish I could find some thing to plug into the nose to prevent the polluted air from getting in :)....See oxygen please!