Very good wallpaper
, it's hot and I like that idea of vector graphic.
May be you should pay heed on these things in order to improve the wallpaper:
1. Make the ear phones sharper.
2. If you are showing a distorted view of ipod then add 3D effect to it , else , make it flat and straight downward.
3. Set Blending Mode of the Outer Glow of lady's shape layer to Normal instead of Overlay.
4. Add some simple and white colored shapes (such as cirlces and tentacles) on the empty space of the wallpaper extending from the lower right croner.
I hope you will put these points in consideration 