iPod Shuffle concept

Another attempt at photo-realistic illustration. When I first heard of the 3rd gen (2009) iPod shuffle being buttonless, I thought it would be controlled via taps and gestures. So using the dimensions of the current gen (4th, 2010) one I decided to have a crack at what I think that'll look like.
The tapped symbol will glow for a few milliseconds, you can scrub the current song by sliding from left to right and increase/reduce the volume either by tapping +/- or by sliding up and down.
I did this all in Inkscape by the way.
What do you think?