We would need 500 iOS7 style wallpapers for the iPhone. They can be cropped images (nature photos or designed backgrounds) found on the Web, but they must be available under the Creative Commons license (free to use and distribute worldwide in a commercial product).
The images should be sharp and colourful (gradients and blurs), but not cluttered with too many details.
Each wallpapers shoud be provided in two sizes: 640 x 960 pixels (for the 3.5 inch Retina screen) and 640 x 1136 pixels (for the 4 inch Retina screen). So there is a total of 1000 wallpapers to ship.
The image format shoud be PNG or JPG.
We also need a file containing the list of shipped wallpapers and, for each wallpaper: the file name, the original author name, the URL link to the original image and the copyright licence.