Ipod's more popular than the zune, but because of that, microsoft's tryng harder to push their 'ipod killer'. It's good apple came back with the ipod because it's pushed microsoft too. A monopoly over anything makes the leader lazy and stop trying.
i got the zune. i love the big screen, and the personalization you can do. (if you go online, you can get cutesy custom art on the back and stuff, it's pretty neat!) Iin March, microsoft introduced the XNA software development of the Xbox for the zune, so now people are developing programs for it. It's only been around for 4 months, but there are already a ton of games which have been created. people have been working on games, organizers, instant Messengers, Emulators, and there's the few who are really want a web browser (it'll be HELL to design that, probably won't happen, but meh)
* iPod: 2.4″ x 4.1″ x 0.41″
* Zune: 2.4″ x 4.25″ x 0.5″ (not much bigger)