I use MP3 players while travelling (in my hostel room, i prefer my computer).
* I don't want a screen to look what song is playing all the time (especially for long lecture podcasts).
* Pressing buttons for common controls is way easier than scrolling when my mp3 player is in my pocket.
* Even my Nokia phone has bigger screen than nano so there is no point watching pictures on nano.
* Shuffle on a lanyard is way cooler and safer (no scratches, less thefts) than nano.
* I am rich enough to own a computer so I don't need to install linux on my nano :D.
Win a shuffle (or 5 Reasons a shuffle is Better than a nano)