The artwork shows up when your playing a song on you portable music player, iPod, Zune, whatever. Usually it's the artwork for the album, so while on your iPod you are playing a song from
The Break-In, the cover for the CD will be displayed on your device.
Here's a link to my iPod Nano and iPhone, playing an Ari song.
http://farm3.static.flickr.com/2271/2192561561_da9bdfe15d_b.jpg
The album art is much more prevalent on the iPhone, since it takes up most of the screen, but you can still see it on the Nano. I know that album art seems like no big deal but it makes a huge difference on a device like an iPhone.
