Screenz
Screenz offers you gorgeous and unique wallpapers for your iPhone, iPad and iPod touch. Decorate your screen with amazing 3D graphics, photographs and graphic designs.
The app offers 2 formats: Normal (320x480px) and HD (1024x1280px).
The backgrounds are updated almost daily, so this way your library will keep on growing!
Be sure to check this app on a regular basis.
Free for a limited time, get it here!