If you ask me this is what Apple's been missing all along!
Probably the biggest reason people haven't bought Macs in recent years has been the findability factor. Even with the internet driving computer sales, many people (including my brother) want the ability to walk into a store and buy whatever program they want (or need). Outside of the major cities, that is at present impossible with Macs.
With the iPod, they're doing stuff right. You're able to find it in thousands of places, and in towns like Osage, Iowa (population: 5,000). And THAT,
by itself, will garner it sales when the rest of the market tries to flood the iPod out.
Now, if iTunes would allow WMAs to be sold through it (I don't expect to see MP3's sold through iTunes anytime soon)...