I actually joke about that all the time to my friends. I've never done the math and assumed it was more than that. I remember when I got my first 12GB player, I used to joke that I could drive to and from California a few times without hearing the same song twice - now I could do more than that!

The point isn't having "hours" of music but rather having the means to hear "what you want, when you want." This is very true when DJing, so I can meet requests, but it's also great when driving around town. I say to my passangers, "What do you want to hear?" Someone who hasn't ridden with me might reply, "What do you have?" To which I'll repeat, "No. What do you want to hear?" Of course, even with my 140gb, I still get stumped all the time!